diff --git a/packages/angular_devkit/build_angular/src/babel/webpack-loader.ts b/packages/angular_devkit/build_angular/src/babel/webpack-loader.ts
index 6283c2d0ac1e..d514fc628b50 100644
--- a/packages/angular_devkit/build_angular/src/babel/webpack-loader.ts
+++ b/packages/angular_devkit/build_angular/src/babel/webpack-loader.ts
@@ -64,6 +64,7 @@ export default custom<AngularCustomOptions>(() => {
     compact: false,
     cacheCompression: false,
     sourceType: 'unambiguous',
+    inputSourceMap: false,
   });
 
   return {