diff --git a/internal/datacoord/datanode_helper.go b/internal/datacoord/datanode_helper.go
index 6994b0d7041e004957c16fd6b12398b638c88531..a1c881b9d12fb1860300427ca4e95b28e345dd94 100644
--- a/internal/datacoord/datanode_helper.go
+++ b/internal/datacoord/datanode_helper.go
@@ -25,6 +25,8 @@ type positionProvider interface {
 	GetVChanPositions(vchans []vchannel, seekFromStartPosition bool) ([]*datapb.VchannelInfo, error)
 }
 
+var _ positionProvider = (*dummyPosProvider)(nil)
+
 type dummyPosProvider struct{}
 
 //GetVChanPositions implements positionProvider
diff --git a/internal/datacoord/server.go b/internal/datacoord/server.go
index af96c95bfbf0befd6fef5ee304859f8bd1bd40f6..3385a0666afce64f798086ee37913509a198ce85 100644
--- a/internal/datacoord/server.go
+++ b/internal/datacoord/server.go
@@ -79,6 +79,9 @@ type RootCoordCreatorFunc func(ctx context.Context, metaRootPath string, etcdEnd
 // makes sure Server implements `DataCoord`
 var _ types.DataCoord = (*Server)(nil)
 
+// makes sure Server implements `positionProvider`
+var _ positionProvider = (*Server)(nil)
+
 // Server implements `types.Datacoord`
 // handles Data Cooridinator related jobs
 type Server struct {