diff --git a/smack-experimental/src/main/resources/org.jivesoftware.smackx/experimental.providers b/smack-experimental/src/main/resources/org.jivesoftware.smackx/experimental.providers
index b78a3111c..d0adb9453 100644
--- a/smack-experimental/src/main/resources/org.jivesoftware.smackx/experimental.providers
+++ b/smack-experimental/src/main/resources/org.jivesoftware.smackx/experimental.providers
@@ -48,7 +48,7 @@
     <!-- GCM JSON payload -->
     <extensionProvider>
         <elementName>gcm</elementName>
-        <namespace></namespace>
+        <namespace>google:mobile:data</namespace>
         <className>org.jivesoftware.smackx.gcm.provider.GcmExtensionProvider</className>
     </extensionProvider>