$OpenBSD$
--- src/posix/sdl/hardware.cpp.orig	Sun Jan 31 00:35:36 2016
+++ src/posix/sdl/hardware.cpp	Sun Jan 31 00:36:17 2016
@@ -204,7 +204,7 @@ 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)