diff --git a/src/surfer.c b/src/surfer.c
index c99dea7..c93c829 100644
--- a/src/surfer.c
+++ b/src/surfer.c
@@ -58,6 +58,12 @@ static char const * _authors[] =
 
 
 /* variables */
+#ifndef GDK_Back
+# define GDK_Back	0
+#endif
+#ifndef GDK_Forward
+# define GDK_Forward	0
+#endif
 static DesktopAccel _surfer_accel[] =
 {
 #ifdef EMBEDDED