diff --git a/lib/index.js b/lib/index.js
index 808d421..67d6ed5 100644
--- a/lib/index.js
+++ b/lib/index.js
@@ -20,7 +20,6 @@ function render({ filename, files, metadata, engineOptions }) {
   // Stop if the current extension can't be transformed
   if (!transform) {
     debug(`no transformer available for ${ext} extension for ${filename}`);
-    extensions.push(ext);
     return Promise.resolve();
   }