diff --git a/packages/angular-cli/models/webpack-configs/styles.ts b/packages/angular-cli/models/webpack-configs/styles.ts
index cd92052d0089..54970efe9584 100644
--- a/packages/angular-cli/models/webpack-configs/styles.ts
+++ b/packages/angular-cli/models/webpack-configs/styles.ts
@@ -125,6 +125,7 @@ export function getStylesConfig(wco: WebpackConfigOptions) {
         sourceMap: true,
         options: {
           postcss: [autoprefixer()].concat(extraPostCssPlugins),
+          postcssLoader: {sourceMap: 'inline'},
           // css-loader, stylus-loader don't support LoaderOptionsPlugin properly
           // options are in query instead
           sassLoader: { sourceMap: buildOptions.sourcemap, includePaths },