$OpenBSD$
--- src/tools/radiant/radiant/url.cpp.orig	Mon Apr 25 19:50:03 2011
+++ src/tools/radiant/radiant/url.cpp	Mon Apr 25 19:50:42 2011
@@ -30,7 +30,7 @@
 static inline bool open_url(const char* url) {
 	return ShellExecute((HWND)GDK_WINDOW_HWND (GTK_WIDGET(GlobalRadiant().getMainWindow())->window), "open", url, 0, 0, SW_SHOW) > (HINSTANCE)32;
 }
-#elif defined(__linux__) || defined(__FreeBSD__)
+#elif defined(__linux__) || defined(__FreeBSD__) || defined (__OpenBSD__)
 #include <stdlib.h>
 static inline bool open_url (const char* url)
 {