diff --git a/drupalgapps.module b/drupalgapps.module
index ac5d1cd..2de3d9a 100644
--- a/drupalgapps.module
+++ b/drupalgapps.module
@@ -725,7 +725,7 @@ function drupalgapps_add_owner($group_id, $email) {
       <?xml version="1.0" encoding="UTF-8"?>
 <atom:entry xmlns:atom="http://www.w3.org/2005/Atom"
     xmlns:apps="http://schemas.google.com/apps/2006"
-    xmlns:gd='http://schemas.google.com/g/2005">
+    xmlns:gd="http://schemas.google.com/g/2005">
     <apps:property name="email" value="'.$email.'"/>
 </atom:entry>
 XML;