diff --git a/sched/trickle_handler.h b/sched/trickle_handler.h
index ee1dfa79fa..7e71726752 100644
--- a/sched/trickle_handler.h
+++ b/sched/trickle_handler.h
@@ -21,4 +21,4 @@
 
 extern int handle_trickle(MSG_FROM_HOST&);
 extern int handle_trickle_init(int argc, char** argv);
-extern int handled_enum, handled_set;
+extern int handled_enum, handled_set, handled_error;