diff --git a/packages/angular_devkit/build_angular/src/builders/dev-server/webpack-server.ts b/packages/angular_devkit/build_angular/src/builders/dev-server/webpack-server.ts
index 0f1b51b59d80..ee4b369a89cb 100644
--- a/packages/angular_devkit/build_angular/src/builders/dev-server/webpack-server.ts
+++ b/packages/angular_devkit/build_angular/src/builders/dev-server/webpack-server.ts
@@ -263,7 +263,7 @@ export function serveWebpackBrowser(
             ...buildEvent,
             baseUrl: serverAddress,
             stats: generateBuildEventStats(webpackRawStats, browserOptions),
-          } as DevServerBuilderOutput;
+          };
         }),
       );
     }),