diff --git a/sys/ping.c b/sys/ping.c
index 465c8aa3a5..d68d2c9034 100644
--- a/sys/ping.c
+++ b/sys/ping.c
@@ -6,7 +6,6 @@
 #include "drivers/cc110x/cc1100.h"
 #include "lpc2387.h"
 
-#include "ktimer.h"
 #include "swtimer.h"
 #include "gpioint.h"
 #include <ping.h>