1 files changed, 4 insertions, 2 deletions
diff --git a/lib/private/group/manager.php b/lib/private/group/manager.php
index 8dcf14fc1d2..56b82c419db 100644
--- a/lib/private/group/manager.php
+++ b/lib/private/group/manager.php
@@ -184,8 +184,10 @@ class Manager extends PublicEmitter implements IGroupManager {
 		$groups = array();
 		foreach ($this->backends as $backend) {
 			$groupIds = $backend->getUserGroups($uid);
-			foreach ($groupIds as $groupId) {
-				$groups[$groupId] = $this->get($groupId);
+			if (is_array($groupIds)) {
+				foreach ($groupIds as $groupId) {
+					$groups[$groupId] = $this->get($groupId);
+				}
 			}
 		}
 		$this->cachedUserGroups[$uid] = $groups;