diff --git a/wsclient_tester/wsclient_tester.module b/wsclient_tester/wsclient_tester.module
index d20f253..dd9ebeb 100644
--- a/wsclient_tester/wsclient_tester.module
+++ b/wsclient_tester/wsclient_tester.module
@@ -33,6 +33,9 @@
 function wsclient_tester_form_wsclient_service_form_alter(&$form, &$form_state) {
   $service = $form_state['build_info']['args'][0];
   foreach ($form['operations']['#rows'] as $operation => $row) {
+    if (!array_key_exists(0, $row)) {
+        continue;
+    } 
     $name = $row[0]['data']['#name'];
     $form['operations']['#rows'][$operation][] = l(t('Test'), WSCLIENT_UI_PATH . '/manage/' . $service->name . '/operation/' . $name . '/test');
   }