diff --git a/pkg/techprofile/tech_profile_if.go b/pkg/techprofile/tech_profile_if.go
index 3267759..a77ea45 100644
--- a/pkg/techprofile/tech_profile_if.go
+++ b/pkg/techprofile/tech_profile_if.go
@@ -34,4 +34,5 @@
 		ShapingCfg *tp_pb.TrafficShapingInfo) *tp_pb.TrafficScheduler
 	GetTrafficQueues(tp *TechProfile, Dir tp_pb.Direction) []*tp_pb.TrafficQueue
 	GetGemportIDForPbit(tp *TechProfile, Dir tp_pb.Direction, pbit uint32) uint32
+	FindAllTpInstances(techProfiletblID uint32, ponIntf uint32, onuID uint32) []TechProfile
 }