diff --git a/modules/@angular/router/src/config.ts b/modules/@angular/router/src/config.ts
index 33e337b1a4..f677fc5474 100644
--- a/modules/@angular/router/src/config.ts
+++ b/modules/@angular/router/src/config.ts
@@ -30,6 +30,6 @@ function validateNode(route: Route): void {
     throw new Error(`Invalid route configuration: routes must have path specified`);
   }
   if (route.path.startsWith('/')) {
-    throw new Error(`Invalid route configuration of route '/a': path cannot start with a slash`);
+    throw new Error(`Invalid route configuration of route '${route.path}': path cannot start with a slash`);
   }
 }
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