diff --git a/lib/src/read-contents/index.js b/lib/src/read-contents/index.js
index 81f263cc..5c3117d7 100644
--- a/lib/src/read-contents/index.js
+++ b/lib/src/read-contents/index.js
@@ -39,7 +39,10 @@ function readContents(optResolver) {
     // This is invoked by the various readXxx modules when they've finished
     // reading the contents.
     function onRead(readErr) {
-      callback(readErr, file);
+      if (readErr) {
+        return callback(readErr);
+      }
+      return callback(null, file);
     }
   }