diff --git a/src/core.h b/src/core.h
index 38e02ba..eae6e79 100644
--- a/src/core.h
+++ b/src/core.h
@@ -33,7 +33,7 @@
 Status FlowAdd_(uint32_t onu_id,
                 uint32_t flow_id, const std::string flow_type,
                 uint32_t access_intf_id, uint32_t network_intf_id,
-                uint32_t gemport_id,
+                uint32_t gemport_id, uint32_t priority,
                 const ::openolt::Classifier& classifier,
                 const ::openolt::Action& action);