diff --git a/build/resources/META-INF/smack-config.xml b/build/resources/META-INF/smack-config.xml
index 7009ab468..52421c703 100644
--- a/build/resources/META-INF/smack-config.xml
+++ b/build/resources/META-INF/smack-config.xml
@@ -33,6 +33,7 @@
         <className>org.jivesoftware.smackx.LastActivityManager</className>
         <className>org.jivesoftware.smack.ReconnectionManager</className>    
         <className>org.jivesoftware.smackx.commands.AdHocCommandManager</className>    
+        <className>org.jivesoftware.smack.util.dns.JavaxResolver</className>
     </startupClasses>