diff --git a/source/core/mainloop.cpp b/source/core/mainloop.cpp
index 3bffcd060..4244326e0 100644
--- a/source/core/mainloop.cpp
+++ b/source/core/mainloop.cpp
@@ -507,9 +507,9 @@ void MainLoop ()
 			}
 			I_SetFrameTime();
 
+			I_StartTic ();
 			TryRunTics (); // will run at least one tic
 			// Update display, next frame, with current state.
-			I_StartTic ();
 
 			Display();
 			Mus_UpdateMusic();		// must be at the end.