diff --git a/src/groups/posts.js b/src/groups/posts.js
index 425a9228e9..c38ed43c8e 100644
--- a/src/groups/posts.js
+++ b/src/groups/posts.js
@@ -20,10 +20,7 @@ module.exports = function (Groups) {
 			function (_groupNames, next) {
 				groupNames = _groupNames[0];
 
-				var keys = groupNames.map(function (groupName) {
-					return 'group:' + groupName + ':member:pids';
-				});
-
+				const keys = groupNames.map(groupName => 'group:' + groupName + ':member:pids');
 				db.sortedSetsAdd(keys, postData.timestamp, postData.pid, next);
 			},
 			function (next) {
diff --git a/src/groups/update.js b/src/groups/update.js
index 6020f93b44..c389590f5d 100644
--- a/src/groups/update.js
+++ b/src/groups/update.js
@@ -232,6 +232,7 @@ module.exports = function (Groups) {
 					async.apply(db.rename, 'group:' + oldName + ':owners', 'group:' + newName + ':owners'),
 					async.apply(db.rename, 'group:' + oldName + ':pending', 'group:' + newName + ':pending'),
 					async.apply(db.rename, 'group:' + oldName + ':invited', 'group:' + newName + ':invited'),
+					async.apply(db.rename, 'group:' + oldName + ':member:pids', 'group:' + newName + ':member:pids'),
 
 					async.apply(renameGroupMember, 'groups:createtime', oldName, newName),
 					async.apply(renameGroupMember, 'groups:visible:createtime', oldName, newName),