diff --git a/public/Set-DbaAgentSchedule.ps1 b/public/Set-DbaAgentSchedule.ps1
index bfc6b5c55e..6c30a14fc2 100644
--- a/public/Set-DbaAgentSchedule.ps1
+++ b/public/Set-DbaAgentSchedule.ps1
@@ -344,7 +344,7 @@ function Set-DbaAgentSchedule {
         if ($EndDate -and ($EndDate -notmatch $RegexDate)) {
             Stop-Function -Message "End date $EndDate needs to be a valid date with format yyyyMMdd" -Target $SqlInstance
             return
-        } elseif ($EndDate -lt $StartDate) {
+        } elseif ($EndDate -and ($EndDate -lt $StartDate)) {
             Stop-Function -Message "End date $EndDate cannot be before start date $StartDate" -Target $SqlInstance
             return
         }
@@ -499,4 +499,4 @@ function Set-DbaAgentSchedule {
         if (Test-FunctionInterrupt) { return }
         Write-Message -Message "Finished changing the job schedule(s)" -Level Verbose
     }
-}
\ No newline at end of file
+}