diff --git a/sys/sys_public.h b/sys/sys_public.h
index 9a88355..7099bb0 100644
--- a/sys/sys_public.h
+++ b/sys/sys_public.h
@@ -149,7 +149,7 @@ void			Sys_Sleep( int msec );
 
 // Sys_Milliseconds should only be used for profiling purposes,
 // any game related timing information should come from event timestamps
-int				Sys_Milliseconds( void );
+unsigned int	Sys_Milliseconds( void );
 
 // for accurate performance testing
 double			Sys_GetClockTicks( void );