diff --git a/src/Illuminate/Database/Eloquent/Builder.php b/src/Illuminate/Database/Eloquent/Builder.php
index 4f4a3c6c392b..af8899004ade 100755
--- a/src/Illuminate/Database/Eloquent/Builder.php
+++ b/src/Illuminate/Database/Eloquent/Builder.php
@@ -102,6 +102,7 @@ class Builder implements BuilderContract
         'getBindings',
         'getConnection',
         'getGrammar',
+        'implode',
         'insert',
         'insertGetId',
         'insertOrIgnore',