diff --git a/main.js b/main.js
index b213f4a..d94f55a 100644
--- a/main.js
+++ b/main.js
@@ -533,6 +533,30 @@ client.login("m.login.password", {"user": settings.matrixuser, "password": setti
             }
             return;
         }
+        if (event.getContent().body.toLowerCase().startsWith("!fixusers")) {
+            sendMatrixNotice(event.getRoomId(), "Inviting missing users across all SMS chats.");
+
+            client.getJoinedRooms().then(function (rooms) {
+                var roomlist = rooms.joined_rooms;
+                for (var i = 0; i < roomlist.length; i++) {
+                    (function (roomid) {
+                        console.log(roomid);
+                        client.getJoinedRoomMembers(roomid).then(function (joined) {
+                            var members = Object.keys(joined.joined);
+                            console.log(members);
+                            for (var j = 0; j < settings.inviteusers.length; j++) {
+                                if (members.indexOf(settings.inviteusers[j]) == -1) {
+                                    client.invite(roomid, settings.inviteusers[j]);
+                                }
+                            }
+                        });
+                    })(roomlist[i]);
+                }
+            });
+
+
+            return;
+        }
         var matches = room.name.match(/SMS_([1-9][0-9]+)(?:_([1-9][0-9]+))?/g);
         console.log(event.getRoomId());
         if (matches == null || (matches.length != 1 && matches.length != 2)) {