diff --git a/packages/@angular/cli/models/webpack-configs/common.ts b/packages/@angular/cli/models/webpack-configs/common.ts
index e4e5ab55fc35..efe454d076ac 100644
--- a/packages/@angular/cli/models/webpack-configs/common.ts
+++ b/packages/@angular/cli/models/webpack-configs/common.ts
@@ -200,6 +200,7 @@ export function getCommonConfig(wco: WebpackConfigOptions) {
   }
 
   return {
+    devtool: 'source-map',
     resolve: {
       extensions: ['.ts', '.js'],
       symlinks: !buildOptions.preserveSymlinks,