diff --git a/sys/include/net/ng_netif.h b/sys/include/net/ng_netif.h
index 121987f91e..e739217b67 100644
--- a/sys/include/net/ng_netif.h
+++ b/sys/include/net/ng_netif.h
@@ -24,6 +24,7 @@
 #ifndef NG_NETIF_H_
 #define NG_NETIF_H_
 
+#include <stdlib.h>
 #include "kernel_types.h"
 
 #ifdef __cplusplus