diff --git a/src/Illuminate/Database/Query/Builder.php b/src/Illuminate/Database/Query/Builder.php
index fbff18ca124a..929ec0180c3f 100755
--- a/src/Illuminate/Database/Query/Builder.php
+++ b/src/Illuminate/Database/Query/Builder.php
@@ -1690,9 +1690,7 @@ public function max($column)
      */
     public function sum($column)
     {
-        $result = $this->aggregate(__FUNCTION__, [$column]);
-
-        return $result ?: 0;
+        return $this->aggregate(__FUNCTION__, [$column]);
     }
 
     /**