diff --git a/cpp/route_guide/route_guide_client.cc b/cpp/route_guide/route_guide_client.cc
index e70207be9fa..e2b7d5a58e9 100644
--- a/cpp/route_guide/route_guide_client.cc
+++ b/cpp/route_guide/route_guide_client.cc
@@ -104,7 +104,7 @@ class RouteGuideClient {
   }
 
   void ListFeatures() {
-    Rectangle rect;
+    examples::Rectangle rect;
     Feature feature;
     ClientContext context;