diff --git a/og_subgroups.common.inc b/og_subgroups.common.inc
index d61b387..05ae37c 100644
--- a/og_subgroups.common.inc
+++ b/og_subgroups.common.inc
@@ -244,20 +244,22 @@ function _og_subgroups_get_inherited_users($group_type, $group_id, $states = arr
   foreach ($parents as $parent_type => $parent_ids) {
     foreach ($parent_ids as $parent_id) {
       $users = og_subgroups_get_users_group($parent_type, $parent_id, $states);
-      foreach ($users['user'] as $membership_id => $uid) {
-        $roles = og_get_user_roles($parent_type, $parent_id, $uid);
-        $membership_ids[] = $membership_id;
-        $user_ids[] = $uid;
-        $inherited_from[$parent_type][] = $parent_id;
-        $inherited_users[$uid][] = array(
-          'uid' => $uid,
-          'membership_id' => $membership_id,
-          'roles' => $roles,
-          'inherited_from' => array(
-            'type' => $parent_type,
-            'id' => $parent_id,
-          )
-        );
+      if (!empty($users)) {
+        foreach ($users['user'] as $membership_id => $uid) {
+          $roles = og_get_user_roles($parent_type, $parent_id, $uid);
+          $membership_ids[] = $membership_id;
+          $user_ids[] = $uid;
+          $inherited_from[$parent_type][] = $parent_id;
+          $inherited_users[$uid][] = array(
+            'uid' => $uid,
+            'membership_id' => $membership_id,
+            'roles' => $roles,
+            'inherited_from' => array(
+              'type' => $parent_type,
+              'id' => $parent_id,
+            )
+          );
+        }
       }
     }
   }