diff -Npur spacenavd-0.5.old/src/event.c spacenavd-0.5/src/event.c
--- src/event.c	2012-03-21 22:15:37.093401293 +0100
+++ src/event.c	2012-03-21 22:14:10.734401301 +0100
@@ -20,7 +20,9 @@ along with this program.  If not, see <h
 #include <stdlib.h>
 #include "event.h"
 #include "client.h"
+#ifdef USE_X11
 #include "proto_x11.h"
+#endif
 #include "proto_unix.h"
 #include "spnavd.h"