diff --git a/index.js b/index.js
index 9e35b9a..a534620 100644
--- a/index.js
+++ b/index.js
@@ -4,6 +4,8 @@ module.exports = {
   process(src) {
     // call directly the webpack loader with a mocked context 
     // as graphql-tag/loader leverages `this.cacheable()`
-    return loader.call({ cacheable() {} }, src);
+    return {
+      code: loader.call({ cacheable() {} }, src)
+    };
   },
 };