diff --git a/pkg/mcs/scheduling/server/cluster.go b/pkg/mcs/scheduling/server/cluster.go
index 7e011bc547c..6f80572673c 100644
--- a/pkg/mcs/scheduling/server/cluster.go
+++ b/pkg/mcs/scheduling/server/cluster.go
@@ -257,8 +257,8 @@ func (c *Cluster) triggerMembershipCheck() {
 	}
 }
 
-// SwitchPDLeader switches the PD service leader.
-func (c *Cluster) SwitchPDLeader(new pdpb.PDClient) bool {
+// SwitchPDServiceLeader switches the PD service leader.
+func (c *Cluster) SwitchPDServiceLeader(new pdpb.PDClient) bool {
 	old := c.pdLeader.Load()
 	return c.pdLeader.CompareAndSwap(old, new)
 }
diff --git a/pkg/mcs/scheduling/server/server.go b/pkg/mcs/scheduling/server/server.go
index 6890745fc35..80156c1e26b 100644
--- a/pkg/mcs/scheduling/server/server.go
+++ b/pkg/mcs/scheduling/server/server.go
@@ -220,7 +220,7 @@ func (s *Server) updatePDServiceMemberLoop() {
 					// double check
 					break
 				}
-				if s.cluster.SwitchPDLeader(pdpb.NewPDClient(cc)) {
+				if s.cluster.SwitchPDServiceLeader(pdpb.NewPDClient(cc)) {
 					if status.Leader != curLeader {
 						log.Info("switch leader", zap.String("leader-id", fmt.Sprintf("%x", ep.ID)), zap.String("endpoint", ep.ClientURLs[0]))
 					}
diff --git a/tools/pd-ctl/pdctl/command/config_command.go b/tools/pd-ctl/pdctl/command/config_command.go
index 7161e46b8ea..f89c63bc51c 100644
--- a/tools/pd-ctl/pdctl/command/config_command.go
+++ b/tools/pd-ctl/pdctl/command/config_command.go
@@ -50,7 +50,7 @@ const (
 	pdServerPrefix                = "pd/api/v1/config/pd-server"
 	serviceMiddlewareConfigPrefix = "pd/api/v1/service-middleware/config"
 	// flagFromPDService has no influence for pd mode, but it is useful for us to debug in pd service mode.
-	flagFromPDService = "from_api_server"
+	flagFromPDService = "from_pd_service"
 )
 
 // NewConfigCommand return a config subcommand of rootCmd
diff --git a/tools/pd-ctl/tests/config/config_test.go b/tools/pd-ctl/tests/config/config_test.go
index 12083abc2f6..39820a6c7b7 100644
--- a/tools/pd-ctl/tests/config/config_test.go
+++ b/tools/pd-ctl/tests/config/config_test.go
@@ -449,7 +449,7 @@ func (suite *configTestSuite) checkConfigForwardControl(cluster *pdTests.TestClu
 			args := []string{"-u", pdAddr, "config", "show"}
 			args = append(args, options...)
 			if isFromPDService {
-				args = append(args, "--from_api_server")
+				args = append(args, "--from_pd_service")
 			}
 			output, err := tests.ExecuteCommand(cmd, args...)
 			re.NoError(err)
@@ -478,7 +478,7 @@ func (suite *configTestSuite) checkConfigForwardControl(cluster *pdTests.TestClu
 			args := []string{"-u", pdAddr, "config", "placement-rules"}
 			args = append(args, options...)
 			if isFromPDService {
-				args = append(args, "--from_api_server")
+				args = append(args, "--from_pd_service")
 			}
 			output, err := tests.ExecuteCommand(cmd, args...)
 			re.NoError(err)