diff --git a/src/Illuminate/Collections/Collection.php b/src/Illuminate/Collections/Collection.php
index ae772b70cbac..f4c7b4007a91 100644
--- a/src/Illuminate/Collections/Collection.php
+++ b/src/Illuminate/Collections/Collection.php
@@ -1128,7 +1128,7 @@ public function sortDesc($options = SORT_REGULAR)
      */
     public function sortBy($callback, $options = SORT_REGULAR, $descending = false)
     {
-        if (is_array($callback)) {
+        if (is_array($callback) && ! is_callable($callback)) {
             return $this->sortByMany($callback);
         }