--- a/src/drivers/joy_linux.c	Mon Jul 14 07:44:42 2008 +0000
+++ b/src/drivers/joy_linux.c	Sun Feb 15 21:47:39 2009 +0000
@@ -16,7 +16,9 @@
  * GNU General Public License for more details.
  */
 
+#ifndef _GNU_SOURCE
 #define _GNU_SOURCE
+#endif
 #include <sys/types.h>
 #include <sys/ioctl.h>
 #include <errno.h>