diff --git a/internal/distributed/indexcoord/param_table.go b/internal/distributed/indexcoord/param_table.go
index 48c9d0579e..e0c481a019 100644
--- a/internal/distributed/indexcoord/param_table.go
+++ b/internal/distributed/indexcoord/param_table.go
@@ -54,6 +54,7 @@ func (pt *ParamTable) initParams() {
 	pt.initServerMaxRecvSize()
 }
 
+// initServicePort initializes the port of IndexCoord service.
 func (pt *ParamTable) initServicePort() {
 	pt.ServicePort = pt.ParseInt("indexCoord.port")
 }