$OpenBSD$
--- src/sdl/hardware.cpp.orig	Sat May 24 17:17:02 2014
+++ src/sdl/hardware.cpp	Sat May 24 17:17:34 2014
@@ -194,7 +194,7 @@ void I_ClosestResolution (int *width, int *height, int
 EXTERN_CVAR(Int, vid_maxfps);
 EXTERN_CVAR(Bool, cl_capfps);
 
-#ifndef __APPLE__
+#if !defined(__APPLE__) && !defined(__OpenBSD__)
 Semaphore FPSLimitSemaphore;
 
 static void FPSLimitNotify(sigval val)