diff --git a/lib/base/process.hpp b/lib/base/process.hpp
index d83ba6ee752..7cbcbe1294a 100644
--- a/lib/base/process.hpp
+++ b/lib/base/process.hpp
@@ -5,6 +5,7 @@
 
 #include "base/i2-base.hpp"
 #include "base/dictionary.hpp"
+#include <cstdint>
 #include <iosfwd>
 #include <deque>
 #include <vector>
@@ -25,7 +26,7 @@ struct ProcessResult
 	pid_t PID;
 	double ExecutionStart;
 	double ExecutionEnd;
-	long ExitStatus;
+	int_fast64_t ExitStatus;
 	String Output;
 };
 
diff --git a/lib/icinga/checkresult.ti b/lib/icinga/checkresult.ti
index 09312dc1285..bee2cbd0b81 100644
--- a/lib/icinga/checkresult.ti
+++ b/lib/icinga/checkresult.ti
@@ -1,5 +1,7 @@
 /* Icinga 2 | (c) 2012 Icinga GmbH | GPLv2+ */
 
+#include <cstdint>
+
 library icinga;
 
 namespace icinga
@@ -50,7 +52,7 @@ class CheckResult
 	[state] Timestamp execution_end;
 
 	[state] Value command;
-	[state] int exit_status;
+	[state] int_fast64_t exit_status;
 
 	[state, enum] ServiceState "state";
 	[state, enum] ServiceState previous_hard_state;
diff --git a/lib/methods/pluginchecktask.cpp b/lib/methods/pluginchecktask.cpp
index b4749fbfd9f..1a3df810528 100644
--- a/lib/methods/pluginchecktask.cpp
+++ b/lib/methods/pluginchecktask.cpp
@@ -10,6 +10,7 @@
 #include "base/utility.hpp"
 #include "base/process.hpp"
 #include "base/convert.hpp"
+#include <sstream>
 
 using namespace icinga;
 
@@ -66,15 +67,22 @@ void PluginCheckTask::ProcessFinishedHandler(const Checkable::Ptr& checkable, co
 	Checkable::CurrentConcurrentChecks.fetch_sub(1);
 	Checkable::DecreasePendingChecks();
 
+	String output = pr.Output.Trim();
+
 	if (pr.ExitStatus > 3) {
 		Process::Arguments parguments = Process::PrepareCommand(commandLine);
 		Log(LogWarning, "PluginCheckTask")
 			<< "Check command for object '" << checkable->GetName() << "' (PID: " << pr.PID
 			<< ", arguments: " << Process::PrettyPrintArguments(parguments) << ") terminated with exit code "
 			<< pr.ExitStatus << ", output: " << pr.Output;
-	}
 
-	String output = pr.Output.Trim();
+		std::stringstream crOutput;
+
+		crOutput << "<Terminated with exit code " << pr.ExitStatus
+			<< " (0x" << std::noshowbase << std::hex << std::uppercase << pr.ExitStatus << ").>";
+
+		output += crOutput.str();
+	}
 
 	std::pair<String, String> co = PluginUtility::ParseCheckOutput(output);
 	cr->SetCommand(commandLine);