diff --git a/group/index.php b/group/index.php
index 2c0eb1c9b8a..df73633f772 100644
--- a/group/index.php
+++ b/group/index.php
@@ -256,7 +256,7 @@ echo '</div>'."\n";
 echo '</form>'."\n";
 
 if (ajaxenabled()) {
-    $PAGE->requires->js_init_call('M.core_group.init_index');
+    $PAGE->requires->js_init_call('M.core_group.init_index', array($CFG->wwwroot, $courseid));
 }
 
 echo $OUTPUT->footer();
diff --git a/group/module.js b/group/module.js
index de5bb497598..2f2cd347664 100644
--- a/group/module.js
+++ b/group/module.js
@@ -40,7 +40,7 @@ M.core_group.init_hover_events = function(Y, events) {
     }
 }
 
-M.core_group.init_index = function(Y) {
-    M.core_group.groupsCombo = new UpdatableGroupsCombo();
-    M.core_group.membersCombo = new UpdatableMembersCombo;
-}
\ No newline at end of file
+M.core_group.init_index = function(Y, wwwroot, courseid) {
+    M.core_group.groupsCombo = new UpdatableGroupsCombo(wwwroot, courseid);
+    M.core_group.membersCombo = new UpdatableMembersCombo(wwwroot, courseid);
+}