diff --git a/core/package.json b/core/package.json
index 544ee08c79..6d7f724c75 100644
--- a/core/package.json
+++ b/core/package.json
@@ -77,7 +77,7 @@
     "clean": "node scripts/clean.js",
     "cdnloader": "node scripts/copy-cdn-loader.js",
     "css.minify": "cleancss -O2 -o ./css/ionic.bundle.css ./css/ionic.bundle.css",
-    "css.sass": "sass src/css:./css",
+    "css.sass": "sass --embed-sources src/css:./css",
     "lint": "npm run lint.ts && npm run lint.sass",
     "lint.fix": "npm run lint.ts.fix && npm run lint.sass.fix",
     "lint.sass": "stylelint \"src/**/*.scss\"",