$OpenBSD$
--- simgear/screen/extensions.cxx.orig	Mon Sep 21 17:13:58 2009
+++ simgear/screen/extensions.cxx	Mon Sep 21 17:14:38 2009
@@ -119,7 +119,7 @@ void *SGGetGLProcAddress(const char *func) {
     if (libHandle != NULL) {
         fptr = dlsym(libHandle, func);
 
-#if defined (__FreeBSD__)
+#if defined (__FreeBSD__) || (__OpenBSD__)
         const char *error = dlerror();
 #else
         char *error = dlerror();