diff --git a/internal/distributed/indexcoord/param_table.go b/internal/distributed/indexcoord/param_table.go
index 4226d89046..48c9d0579e 100644
--- a/internal/distributed/indexcoord/param_table.go
+++ b/internal/distributed/indexcoord/param_table.go
@@ -58,6 +58,7 @@ func (pt *ParamTable) initServicePort() {
 	pt.ServicePort = pt.ParseInt("indexCoord.port")
 }
 
+// initServiceAddress initializes the address of IndexCoord service.
 func (pt *ParamTable) initServiceAddress() {
 	ret, err := pt.Load("_IndexCoordAddress")
 	if err != nil {