diff --git a/internal/pkg/core/openolt_flowmgr.go b/internal/pkg/core/openolt_flowmgr.go
index abaa97b..618a3f4 100644
--- a/internal/pkg/core/openolt_flowmgr.go
+++ b/internal/pkg/core/openolt_flowmgr.go
@@ -135,6 +135,8 @@
 	PortNo = "portNo"
 	//AllocID constant
 	AllocID = "allocId"
+	//GemID constant
+	GemID = "gemId"
 
 	//NoneOnuID constant
 	NoneOnuID = -1