diff --git a/internal/datacoord/errors.go b/internal/datacoord/errors.go
index c1ef0dea3b..d7ccb904b7 100644
--- a/internal/datacoord/errors.go
+++ b/internal/datacoord/errors.go
@@ -33,7 +33,7 @@ var errNilStatusResponse = errors.New("response has nil status")
 var errUnknownResponseType = errors.New("unknown response type")
 
 func msgDataCoordIsUnhealthy(coordID UniqueID) string {
-	return fmt.Sprintf("data coord %d is not ready", coordID)
+	return fmt.Sprintf("DataCoord %d is not ready", coordID)
 }
 
 func errDataCoordIsUnhealthy(coordID UniqueID) error {