diff --git a/app/Http/Controllers/Chart/CategoryController.php b/app/Http/Controllers/Chart/CategoryController.php
index 55d71bb899..ce453131bc 100644
--- a/app/Http/Controllers/Chart/CategoryController.php
+++ b/app/Http/Controllers/Chart/CategoryController.php
@@ -67,7 +67,7 @@ class CategoryController extends Controller
 
         $start = $repository->firstUseDate($category);
 
-        if (is_null($first)) {
+        if (is_null($start)) {
             $start = new Carbon;
         }