diff --git a/include/net/6lowpan.h b/include/net/6lowpan.h
index f7d372b..79b530f 100644
--- a/include/net/6lowpan.h
+++ b/include/net/6lowpan.h
@@ -54,6 +54,7 @@
 #define __6LOWPAN_H__
 
 #include <net/ipv6.h>
+#include <net/net_namespace.h>
 
 #define UIP_802154_SHORTADDR_LEN	2  /* compressed ipv6 address length */
 #define UIP_IPH_LEN			40 /* ipv6 fixed header size */