Set root controller namespace.

app/Providers/RouteServiceProvider.php

@@ -14,7 +14,9 @@ class RouteServiceProvider extends ServiceProvider {
 	 */
 	public function before()
 	{
-		//
+		URL::setRootControllerNamespace(
+			trim(config('namespaces.controller'), '\\')
+		);
 	}
 
 	/**