diff --git a/src/servers/app/MessageLooper.cpp b/src/servers/app/MessageLooper.cpp
index 1bb483c2e7..2fa5cd552f 100644
--- a/src/servers/app/MessageLooper.cpp
+++ b/src/servers/app/MessageLooper.cpp
@@ -82,11 +82,11 @@ MessageLooper::Quit()
 	\param code ID code of the message to post
 */
 status_t
-MessageLooper::PostMessage(int32 code)
+MessageLooper::PostMessage(int32 code, bigtime_t timeout)
 {
 	BPrivate::LinkSender link(MessagePort());
 	link.StartMessage(code);
-	return link.Flush();
+	return link.Flush(timeout);
 }
 
 
diff --git a/src/servers/app/MessageLooper.h b/src/servers/app/MessageLooper.h
index ec0cc67103..9cacd304fb 100644
--- a/src/servers/app/MessageLooper.h
+++ b/src/servers/app/MessageLooper.h
@@ -22,7 +22,7 @@ class MessageLooper : public BLocker {
 		virtual	bool	Run();
 		virtual	void	Quit();
 
-		status_t		PostMessage(int32 code);
+		status_t		PostMessage(int32 code, bigtime_t timeout = B_INFINITE_TIMEOUT);
 		thread_id		Thread() const { return fThread; }
 		bool			IsQuitting() const { return fQuitting; }
 		sem_id			DeathSemaphore() const { return fDeathSemaphore; }