diff --git a/src/Illuminate/Database/Connection.php b/src/Illuminate/Database/Connection.php
index c6ca41d7b3ba..99f23d2f4f93 100755
--- a/src/Illuminate/Database/Connection.php
+++ b/src/Illuminate/Database/Connection.php
@@ -336,13 +336,15 @@ public function select($query, $bindings = [], $useReadPdo = true)
 
             $fetchMode = $me->getFetchMode();
             $fetchArgument = $me->getFetchArgument();
+            $fetchConstructorArgument = $me->getFetchConstructorArgument();
 
             if ($fetchMode === PDO::FETCH_CLASS && ! isset($fetchArgument)) {
                 $fetchArgument = 'StdClass';
+                $fetchConstructorArgument = null;
             }
 
             return isset($fetchArgument)
-                ? $statement->fetchAll($fetchMode, $fetchArgument, $me->getFetchConstructorArgument())
+                ? $statement->fetchAll($fetchMode, $fetchArgument, $fetchConstructorArgument)
                 : $statement->fetchAll($fetchMode);
         });
     }
@@ -366,13 +368,15 @@ public function cursor($query, $bindings = [], $useReadPdo = true)
 
             $fetchMode = $me->getFetchMode();
             $fetchArgument = $me->getFetchArgument();
+            $fetchConstructorArgument = $me->getFetchConstructorArgument();
 
             if ($fetchMode === PDO::FETCH_CLASS && ! isset($fetchArgument)) {
                 $fetchArgument = 'StdClass';
+                $fetchConstructorArgument = null;
             }
 
             if (isset($fetchArgument)) {
-                $statement->setFetchMode($fetchMode, $fetchArgument, $me->getFetchConstructorArgument());
+                $statement->setFetchMode($fetchMode, $fetchArgument, $fetchConstructorArgument);
             } else {
                 $statement->setFetchMode($fetchMode);
             }