$OpenBSD$
--- src/posix/sdl/hardware.cpp.orig	Sat Feb  6 00:05:27 2016
+++ src/posix/sdl/hardware.cpp	Fri Feb 12 20:54:37 2016
@@ -242,7 +242,7 @@ 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)