diff --git a/examples/route_guide/server/server.go b/examples/route_guide/server/server.go
index 7fa8d861..b91a61f2 100644
--- a/examples/route_guide/server/server.go
+++ b/examples/route_guide/server/server.go
@@ -160,10 +160,10 @@ func (s *routeGuideServer) RouteChat(stream pb.RouteGuide_RouteChatServer) error
 func (s *routeGuideServer) loadFeatures(filePath string) {
 	file, err := ioutil.ReadFile(filePath)
 	if err != nil {
-		log.Fatal("Failed to load default features: %v", err)
+		log.Fatalf("Failed to load default features: %v", err)
 	}
 	if err := json.Unmarshal(file, &(s.savedFeatures)); err != nil {
-		log.Fatal("Failed to load default features: %v", err)
+		log.Fatalf("Failed to load default features: %v", err)
 	}
 }