$OpenBSD$
--- include/SFML/Config.hpp.orig	Mon Dec 26 17:48:20 2011
+++ include/SFML/Config.hpp	Mon Dec 26 17:48:35 2011
@@ -49,7 +49,7 @@
     // MacOS
     #define SFML_SYSTEM_MACOS
 
-#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__)
+#elif defined(__FreeBSD__) || defined(__FreeBSD_kernel__) || defined(__OpenBSD__)
 
     // FreeBSD
     #define SFML_SYSTEM_FREEBSD