diff --git a/.eslintrc b/.eslintrc
index b529fa20686..4148a259baa 100644
--- a/.eslintrc
+++ b/.eslintrc
@@ -76,6 +76,7 @@
     "no-eval": 2,
     "no-extend-native": 2,
     "no-extra-parens": 0,
+    "no-inner-declarations": 2,
     "no-irregular-whitespace": 2,
     "no-iterator": 2,
     "no-loop-func": 2,
diff --git a/app/assets/javascripts/discourse/views/reorder-categories.js.es6 b/app/assets/javascripts/discourse/views/reorder-categories.js.es6
index 570c9ec9637..86e0093cad4 100644
--- a/app/assets/javascripts/discourse/views/reorder-categories.js.es6
+++ b/app/assets/javascripts/discourse/views/reorder-categories.js.es6
@@ -54,7 +54,7 @@ export default ModalBodyView.extend({
       const startTime = performance.now();
       const duration = 100;
 
-      function doScroll(timestamp) {
+      const doScroll = function(timestamp) {
         let progress = (timestamp - startTime) / duration;
         if (progress > 1) {
           progress = 1;
@@ -73,7 +73,7 @@ export default ModalBodyView.extend({
 
         const iprogress = 1 - progress;
         scrollParent.scrollTop(goal * progress + current * iprogress);
-      }
+      };
       window.requestAnimationFrame(doScroll);
     }
   }