diff --git a/src/BuiltInTools/dotnet-watch/Program.cs b/src/BuiltInTools/dotnet-watch/Program.cs
index 9a72e6744da4..7ec40e095791 100644
--- a/src/BuiltInTools/dotnet-watch/Program.cs
+++ b/src/BuiltInTools/dotnet-watch/Program.cs
@@ -105,11 +105,11 @@ public static async Task<int> Main(string[] args)
 
         internal async Task<int> RunAsync(string[] args)
         {
-            var rootCommand = CreateRootCommand(HandleWatch);
+            var rootCommand = CreateRootCommand(HandleWatch, _reporter);
             return await rootCommand.InvokeAsync(args);
         }
 
-        internal static RootCommand CreateRootCommand(Func<CommandLineOptions, Task<int>> handler)
+        internal static RootCommand CreateRootCommand(Func<CommandLineOptions, Task<int>> handler, IReporter reporter)
         {
             var quiet = new Option<bool>(
                 new[] { "--quiet", "-q" },
@@ -137,8 +137,11 @@ internal static RootCommand CreateRootCommand(Func<CommandLineOptions, Task<int>
                     new[] { "--no-hot-reload" },
                     "Suppress hot reload for supported apps."),
                  new Option<string>(
-                    new[] { "--project", "-p" },
+                     "--project",
                     "The project to watch"),
+                 new Option<string>(
+                     "-p",
+                     "The project to watch") { IsHidden = true },
                  new Option<bool>(
                     "--list",
                     "Lists all discovered files without starting the watcher"),
@@ -147,6 +150,16 @@ internal static RootCommand CreateRootCommand(Func<CommandLineOptions, Task<int>
             root.TreatUnmatchedTokensAsErrors = false;
             root.Handler = CommandHandler.Create((CommandLineOptions options, ParseResult parseResults) =>
             {
+                if (string.IsNullOrEmpty(options.Project))
+                {
+                    var projectOptionShort = parseResults.ValueForOption<string>("-p");
+                    if (!string.IsNullOrEmpty(projectOptionShort))
+                    {
+                        reporter.Warn(Resources.Warning_ProjectAbbreviationDeprecated);
+                        options.Project = projectOptionShort;
+                    }
+                }
+
                 string[] remainingArguments;
                 if (parseResults.UnparsedTokens.Any() && parseResults.UnmatchedTokens.Any())
                 {
diff --git a/src/BuiltInTools/dotnet-watch/Resources.resx b/src/BuiltInTools/dotnet-watch/Resources.resx
index 40d7b9cdf729..30a8cd6c1ec8 100644
--- a/src/BuiltInTools/dotnet-watch/Resources.resx
+++ b/src/BuiltInTools/dotnet-watch/Resources.resx
@@ -129,4 +129,7 @@
   <data name="Error_QuietAndVerboseSpecified" xml:space="preserve">
     <value>Cannot specify both '--quiet' and '--verbose' options.</value>
   </data>
+  <data name="Warning_ProjectAbbreviationDeprecated" xml:space="preserve">
+    <value>Warning NETSDK1174: The abbreviation of -p for --project is deprecated. Please use --project.</value>
+  </data>
 </root>
\ No newline at end of file
diff --git a/src/BuiltInTools/dotnet-watch/xlf/Resources.cs.xlf b/src/BuiltInTools/dotnet-watch/xlf/Resources.cs.xlf
index 59d5f98e5b77..43f860f58ef0 100644
--- a/src/BuiltInTools/dotnet-watch/xlf/Resources.cs.xlf
+++ b/src/BuiltInTools/dotnet-watch/xlf/Resources.cs.xlf
@@ -22,6 +22,11 @@
         <target state="translated">Možnosti --quiet a --verbose se nedají zadat spolu.</target>
         <note />
       </trans-unit>
+      <trans-unit id="Warning_ProjectAbbreviationDeprecated">
+        <source>Warning NETSDK1174: The abbreviation of -p for --project is deprecated. Please use --project.</source>
+        <target state="new">Warning NETSDK1174: The abbreviation of -p for --project is deprecated. Please use --project.</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file
diff --git a/src/BuiltInTools/dotnet-watch/xlf/Resources.de.xlf b/src/BuiltInTools/dotnet-watch/xlf/Resources.de.xlf
index b772a5351792..dc9dcdd089cf 100644
--- a/src/BuiltInTools/dotnet-watch/xlf/Resources.de.xlf
+++ b/src/BuiltInTools/dotnet-watch/xlf/Resources.de.xlf
@@ -22,6 +22,11 @@
         <target state="translated">Die Optionen "--quiet" und "--verbose" können nicht gleichzeitig angegeben werden.</target>
         <note />
       </trans-unit>
+      <trans-unit id="Warning_ProjectAbbreviationDeprecated">
+        <source>Warning NETSDK1174: The abbreviation of -p for --project is deprecated. Please use --project.</source>
+        <target state="new">Warning NETSDK1174: The abbreviation of -p for --project is deprecated. Please use --project.</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file
diff --git a/src/BuiltInTools/dotnet-watch/xlf/Resources.es.xlf b/src/BuiltInTools/dotnet-watch/xlf/Resources.es.xlf
index 9a01f59deae5..7b92c1b8987c 100644
--- a/src/BuiltInTools/dotnet-watch/xlf/Resources.es.xlf
+++ b/src/BuiltInTools/dotnet-watch/xlf/Resources.es.xlf
@@ -22,6 +22,11 @@
         <target state="translated">No se pueden especificar ambas opciones, "--quiet" y "--verbose".</target>
         <note />
       </trans-unit>
+      <trans-unit id="Warning_ProjectAbbreviationDeprecated">
+        <source>Warning NETSDK1174: The abbreviation of -p for --project is deprecated. Please use --project.</source>
+        <target state="new">Warning NETSDK1174: The abbreviation of -p for --project is deprecated. Please use --project.</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file
diff --git a/src/BuiltInTools/dotnet-watch/xlf/Resources.fr.xlf b/src/BuiltInTools/dotnet-watch/xlf/Resources.fr.xlf
index d06ee87bd3e9..c3e3202db59a 100644
--- a/src/BuiltInTools/dotnet-watch/xlf/Resources.fr.xlf
+++ b/src/BuiltInTools/dotnet-watch/xlf/Resources.fr.xlf
@@ -22,6 +22,11 @@
         <target state="translated">Impossible de spécifier les options '--quiet' et '--verbose'.</target>
         <note />
       </trans-unit>
+      <trans-unit id="Warning_ProjectAbbreviationDeprecated">
+        <source>Warning NETSDK1174: The abbreviation of -p for --project is deprecated. Please use --project.</source>
+        <target state="new">Warning NETSDK1174: The abbreviation of -p for --project is deprecated. Please use --project.</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file
diff --git a/src/BuiltInTools/dotnet-watch/xlf/Resources.it.xlf b/src/BuiltInTools/dotnet-watch/xlf/Resources.it.xlf
index ced7af187f3f..83b5c6351028 100644
--- a/src/BuiltInTools/dotnet-watch/xlf/Resources.it.xlf
+++ b/src/BuiltInTools/dotnet-watch/xlf/Resources.it.xlf
@@ -22,6 +22,11 @@
         <target state="translated">Non è possibile specificare entrambe le opzioni '--quiet' e '--verbose'.</target>
         <note />
       </trans-unit>
+      <trans-unit id="Warning_ProjectAbbreviationDeprecated">
+        <source>Warning NETSDK1174: The abbreviation of -p for --project is deprecated. Please use --project.</source>
+        <target state="new">Warning NETSDK1174: The abbreviation of -p for --project is deprecated. Please use --project.</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file
diff --git a/src/BuiltInTools/dotnet-watch/xlf/Resources.ja.xlf b/src/BuiltInTools/dotnet-watch/xlf/Resources.ja.xlf
index 34e19a784b9d..2e4c1202b35f 100644
--- a/src/BuiltInTools/dotnet-watch/xlf/Resources.ja.xlf
+++ b/src/BuiltInTools/dotnet-watch/xlf/Resources.ja.xlf
@@ -22,6 +22,11 @@
         <target state="translated">'--quiet' と '--verbose' の両方のオプションを指定することはできません。</target>
         <note />
       </trans-unit>
+      <trans-unit id="Warning_ProjectAbbreviationDeprecated">
+        <source>Warning NETSDK1174: The abbreviation of -p for --project is deprecated. Please use --project.</source>
+        <target state="new">Warning NETSDK1174: The abbreviation of -p for --project is deprecated. Please use --project.</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file
diff --git a/src/BuiltInTools/dotnet-watch/xlf/Resources.ko.xlf b/src/BuiltInTools/dotnet-watch/xlf/Resources.ko.xlf
index 130b666b6f04..7c20a39fdc9d 100644
--- a/src/BuiltInTools/dotnet-watch/xlf/Resources.ko.xlf
+++ b/src/BuiltInTools/dotnet-watch/xlf/Resources.ko.xlf
@@ -22,6 +22,11 @@
         <target state="translated">'--quiet' 옵션과 '--verbose' 옵션을 둘 다 지정할 수는 없습니다.</target>
         <note />
       </trans-unit>
+      <trans-unit id="Warning_ProjectAbbreviationDeprecated">
+        <source>Warning NETSDK1174: The abbreviation of -p for --project is deprecated. Please use --project.</source>
+        <target state="new">Warning NETSDK1174: The abbreviation of -p for --project is deprecated. Please use --project.</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file
diff --git a/src/BuiltInTools/dotnet-watch/xlf/Resources.pl.xlf b/src/BuiltInTools/dotnet-watch/xlf/Resources.pl.xlf
index b31b93d70753..b28408e463aa 100644
--- a/src/BuiltInTools/dotnet-watch/xlf/Resources.pl.xlf
+++ b/src/BuiltInTools/dotnet-watch/xlf/Resources.pl.xlf
@@ -22,6 +22,11 @@
         <target state="translated">Nie można jednocześnie określić opcji „--quiet” i „--verbose”.</target>
         <note />
       </trans-unit>
+      <trans-unit id="Warning_ProjectAbbreviationDeprecated">
+        <source>Warning NETSDK1174: The abbreviation of -p for --project is deprecated. Please use --project.</source>
+        <target state="new">Warning NETSDK1174: The abbreviation of -p for --project is deprecated. Please use --project.</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file
diff --git a/src/BuiltInTools/dotnet-watch/xlf/Resources.pt-BR.xlf b/src/BuiltInTools/dotnet-watch/xlf/Resources.pt-BR.xlf
index e7a1e5088eda..c5c484e3f462 100644
--- a/src/BuiltInTools/dotnet-watch/xlf/Resources.pt-BR.xlf
+++ b/src/BuiltInTools/dotnet-watch/xlf/Resources.pt-BR.xlf
@@ -22,6 +22,11 @@
         <target state="translated">Não é possível especificar as opções '--quiet' e '--verbose'.</target>
         <note />
       </trans-unit>
+      <trans-unit id="Warning_ProjectAbbreviationDeprecated">
+        <source>Warning NETSDK1174: The abbreviation of -p for --project is deprecated. Please use --project.</source>
+        <target state="new">Warning NETSDK1174: The abbreviation of -p for --project is deprecated. Please use --project.</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file
diff --git a/src/BuiltInTools/dotnet-watch/xlf/Resources.ru.xlf b/src/BuiltInTools/dotnet-watch/xlf/Resources.ru.xlf
index 0230037ff9be..656d3c554793 100644
--- a/src/BuiltInTools/dotnet-watch/xlf/Resources.ru.xlf
+++ b/src/BuiltInTools/dotnet-watch/xlf/Resources.ru.xlf
@@ -22,6 +22,11 @@
         <target state="translated">Невозможно одновременно указать параметры "--quiet" и "--verbose".</target>
         <note />
       </trans-unit>
+      <trans-unit id="Warning_ProjectAbbreviationDeprecated">
+        <source>Warning NETSDK1174: The abbreviation of -p for --project is deprecated. Please use --project.</source>
+        <target state="new">Warning NETSDK1174: The abbreviation of -p for --project is deprecated. Please use --project.</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file
diff --git a/src/BuiltInTools/dotnet-watch/xlf/Resources.tr.xlf b/src/BuiltInTools/dotnet-watch/xlf/Resources.tr.xlf
index fe0b1cd8c3f0..70ccc020fa8c 100644
--- a/src/BuiltInTools/dotnet-watch/xlf/Resources.tr.xlf
+++ b/src/BuiltInTools/dotnet-watch/xlf/Resources.tr.xlf
@@ -22,6 +22,11 @@
         <target state="translated">Hem '--quiet' hem de '--verbose' seçenekleri belirtilemez.</target>
         <note />
       </trans-unit>
+      <trans-unit id="Warning_ProjectAbbreviationDeprecated">
+        <source>Warning NETSDK1174: The abbreviation of -p for --project is deprecated. Please use --project.</source>
+        <target state="new">Warning NETSDK1174: The abbreviation of -p for --project is deprecated. Please use --project.</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file
diff --git a/src/BuiltInTools/dotnet-watch/xlf/Resources.zh-Hans.xlf b/src/BuiltInTools/dotnet-watch/xlf/Resources.zh-Hans.xlf
index f25a47e35b39..92902902fd1c 100644
--- a/src/BuiltInTools/dotnet-watch/xlf/Resources.zh-Hans.xlf
+++ b/src/BuiltInTools/dotnet-watch/xlf/Resources.zh-Hans.xlf
@@ -22,6 +22,11 @@
         <target state="translated">不能同时指定 "--quiet" 和 "--verbose" 选项。</target>
         <note />
       </trans-unit>
+      <trans-unit id="Warning_ProjectAbbreviationDeprecated">
+        <source>Warning NETSDK1174: The abbreviation of -p for --project is deprecated. Please use --project.</source>
+        <target state="new">Warning NETSDK1174: The abbreviation of -p for --project is deprecated. Please use --project.</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file
diff --git a/src/BuiltInTools/dotnet-watch/xlf/Resources.zh-Hant.xlf b/src/BuiltInTools/dotnet-watch/xlf/Resources.zh-Hant.xlf
index 69667a91d1a1..4762234ba060 100644
--- a/src/BuiltInTools/dotnet-watch/xlf/Resources.zh-Hant.xlf
+++ b/src/BuiltInTools/dotnet-watch/xlf/Resources.zh-Hant.xlf
@@ -22,6 +22,11 @@
         <target state="translated">無法同時指定 '--quiet' 和 '--verbose' 選項。</target>
         <note />
       </trans-unit>
+      <trans-unit id="Warning_ProjectAbbreviationDeprecated">
+        <source>Warning NETSDK1174: The abbreviation of -p for --project is deprecated. Please use --project.</source>
+        <target state="new">Warning NETSDK1174: The abbreviation of -p for --project is deprecated. Please use --project.</target>
+        <note />
+      </trans-unit>
     </body>
   </file>
 </xliff>
\ No newline at end of file
diff --git a/src/Tests/dotnet-watch.Tests/CommandLineOptionsTests.cs b/src/Tests/dotnet-watch.Tests/CommandLineOptionsTests.cs
index e35be5a939e9..0e38505461bd 100644
--- a/src/Tests/dotnet-watch.Tests/CommandLineOptionsTests.cs
+++ b/src/Tests/dotnet-watch.Tests/CommandLineOptionsTests.cs
@@ -5,6 +5,7 @@
 using System.CommandLine.IO;
 using System.CommandLine.Parsing;
 using System.Threading.Tasks;
+using Moq;
 using Xunit;
 using Xunit.Abstractions;
 
@@ -12,11 +13,13 @@ namespace Microsoft.DotNet.Watcher.Tools
 {
     public class CommandLineOptionsTests
     {
+        private readonly Extensions.Tools.Internal.TestReporter _testReporter;
         private readonly TestConsole _console;
 
         public CommandLineOptionsTests(ITestOutputHelper output)
         {
             _console = new();
+            _testReporter = new(output);
         }
 
         [Theory]
@@ -26,7 +29,7 @@ public CommandLineOptionsTests(ITestOutputHelper output)
         [InlineData(new object[] { new[] { "--help", "--bogus" } })]
         public async Task HelpArgs(string[] args)
         {
-            var rootCommand = Program.CreateRootCommand(c => Task.FromResult(0));
+            var rootCommand = Program.CreateRootCommand(c => Task.FromResult(0), _testReporter);
 
             await rootCommand.InvokeAsync(args, _console);
 
@@ -46,7 +49,7 @@ public async Task ParsesRemainingArgs(string[] args, string[] expected)
             {
                 options = c;
                 return Task.FromResult(0);
-            });
+            }, _testReporter);
 
             await rootCommand.InvokeAsync(args, _console);
 
@@ -59,11 +62,40 @@ public async Task ParsesRemainingArgs(string[] args, string[] expected)
         [Fact]
         public async Task CannotHaveQuietAndVerbose()
         {
-            var rootCommand = Program.CreateRootCommand(c => Task.FromResult(0));
+            var rootCommand = Program.CreateRootCommand(c => Task.FromResult(0), _testReporter);
 
             await rootCommand.InvokeAsync(new[] { "--quiet", "--verbose" }, _console);
 
             Assert.Contains(Resources.Error_QuietAndVerboseSpecified, _console.Error.ToString());
         }
+
+        [Fact]
+        public async Task ShortFormForProjectArgumentPrintsWarning()
+        {
+            var reporter = new Mock<Extensions.Tools.Internal.IReporter>();
+            reporter.Setup(r => r.Warn(Resources.Warning_ProjectAbbreviationDeprecated)).Verifiable();
+            CommandLineOptions options = null;
+            var rootCommand = Program.CreateRootCommand(c => { options = c; return Task.FromResult(0); }, reporter.Object);
+
+            await rootCommand.InvokeAsync(new[] { "-p", "MyProject.csproj" }, _console);
+
+            reporter.Verify();
+            Assert.NotNull(options);
+            Assert.Equal("MyProject.csproj", options.Project);
+        }
+
+        [Fact]
+        public async Task LongFormForProjectArgumentWorks()
+        {
+            var reporter = new Mock<Extensions.Tools.Internal.IReporter>();
+            CommandLineOptions options = null;
+            var rootCommand = Program.CreateRootCommand(c => { options = c; return Task.FromResult(0); }, reporter.Object);
+
+            await rootCommand.InvokeAsync(new[] { "--project", "MyProject.csproj" }, _console);
+
+            reporter.Verify(r => r.Warn(It.IsAny<string>()), Times.Never());
+            Assert.NotNull(options);
+            Assert.Equal("MyProject.csproj", options.Project);
+        }
     }
 }