diff --git a/internal/proxy/channels_mgr.go b/internal/proxy/channels_mgr.go
index cf8a4dc92f..2cfd4d0166 100644
--- a/internal/proxy/channels_mgr.go
+++ b/internal/proxy/channels_mgr.go
@@ -449,6 +449,9 @@ func newSingleTypeChannelsMgr(
 	}
 }
 
+// implementation assertion
+var _ channelsMgr = (*channelsMgrImpl)(nil)
+
 type channelsMgrImpl struct {
 	dmlChannelsMgr *singleTypeChannelsMgr
 	dqlChannelsMgr *singleTypeChannelsMgr