diff -r e8084e82b064 src/sdl/i_system.cpp
--- a/src/sdl/i_system.cpp	Wed Jan 01 19:20:55 2014 +0100
+++ b/src/sdl/i_system.cpp	Thu Jan 02 16:43:06 2014 +0100
@@ -290,7 +290,8 @@
 	I_GetTime = I_GetTimePolled;
 	I_FreezeTime = I_FreezeTimePolled;
 
-	if (setitimer(ITIMER_REAL, &itv, NULL) != 0)
+        // [BB] For now I_WaitForTicSignaled doesn't work on the client.
+	if ( NETWORK_InClientMode() || ( setitimer(ITIMER_REAL, &itv, NULL) != 0 ) )
 	{
 		//I_GetTime = I_GetTimePolled;
 		//I_FreezeTime = I_FreezeTimePolled;