diff --git a/src/Illuminate/Support/Collection.php b/src/Illuminate/Support/Collection.php
index 0ff887004c78..ce60a66f26a9 100644
--- a/src/Illuminate/Support/Collection.php
+++ b/src/Illuminate/Support/Collection.php
@@ -884,7 +884,7 @@ public function mapToDictionary(callable $callback)
     {
         $dictionary = [];
 
-        $this->each(function ($item, $key) use(&$dictionary, $callback) {
+        $this->each(function ($item, $key) use (&$dictionary, $callback) {
             $pair = $callback($item, $key);
             $key = key($pair);
             $value = reset($pair);