diff --git a/app/scripts/controllers/metametrics.js b/app/scripts/controllers/metametrics.js
index 8348513c1..7e1b6c6ec 100644
--- a/app/scripts/controllers/metametrics.js
+++ b/app/scripts/controllers/metametrics.js
@@ -630,11 +630,9 @@ export default class MetaMetricsController {
    * @returns {[]}
    */
   _getAllNFTsFlattened = memoize((allCollectibles = {}) => {
-    return Object.values(allCollectibles)
-      .reduce((result, chainNFTs) => {
-        return result.concat(Object.values(chainNFTs));
-      }, [])
-      .flat();
+    return Object.values(allCollectibles).reduce((result, chainNFTs) => {
+      return result.concat(...Object.values(chainNFTs));
+    }, []);
   });
 
   /**