diff --git a/src/core.h b/src/core.h
index 182b06d..2890eb3 100644
--- a/src/core.h
+++ b/src/core.h
@@ -42,6 +42,7 @@
                 uint32_t gemport_id, uint32_t priority,
                 const ::openolt::Classifier& classifier,
                 const ::openolt::Action& action);
+Status FlowRemove_(uint32_t flow_id, const std::string flow_type);
 Status Disable_();
 Status Reenable_();