diff --git a/lib/ll_types.c b/lib/ll_types.c
index 448892bf..0c391836 100644
--- a/lib/ll_types.c
+++ b/lib/ll_types.c
@@ -103,6 +103,7 @@ __PF(IEEE802154, ieee802.15.4)
 __PF(PHONET, phonet)
 __PF(PHONET_PIPE, phonet_pipe)
 __PF(CAIF, caif)
+__PF(IP6GRE, gre6)
 
 __PF(NONE, none)
 __PF(VOID,void)