diff --git a/sys/netlink/netlink.h b/sys/netlink/netlink.h
--- a/sys/netlink/netlink.h
+++ b/sys/netlink/netlink.h
@@ -61,6 +61,10 @@
 #ifndef _NETLINK_NETLINK_H_
 #define _NETLINK_NETLINK_H_
 
+#ifdef _KERNEL
+#include "opt_netlink.h"
+#endif
+
 #include <sys/types.h>
 #include <sys/socket.h>