diff --git a/packages/angular_devkit/build_angular/src/webpack/configs/styles.ts b/packages/angular_devkit/build_angular/src/webpack/configs/styles.ts
index b1ec2fcec2d0..eac8f9ab8d54 100644
--- a/packages/angular_devkit/build_angular/src/webpack/configs/styles.ts
+++ b/packages/angular_devkit/build_angular/src/webpack/configs/styles.ts
@@ -360,6 +360,7 @@ function getSassLoaderOptions(
           quietDeps: !verbose,
           verbose,
           syntax: indentedSyntax ? 'indented' : 'scss',
+          sourceMapIncludeSources: true,
         }),
       }
     : {