diff --git a/library/Zend/Http/Client.php b/library/Zend/Http/Client.php
index 2b96707067..441f70239b 100644
--- a/library/Zend/Http/Client.php
+++ b/library/Zend/Http/Client.php
@@ -1041,7 +1041,7 @@ public function request($method = null)
                    if (! empty($query)) {
                        $query .= '&';
                    }
-                $query .= http_build_query($this->paramsGet, null, '&');
+                $query .= http_build_query($this->paramsGet, '', '&');
                 if ($this->config['rfc3986_strict']) {
                     $query = str_replace('+', '%20', $query);
                 }