diff --git a/includes/script.js b/includes/script.js
index 809a6bd..07ca460 100644
--- a/includes/script.js
+++ b/includes/script.js
@@ -495,9 +495,13 @@ $(document).ready(function() {
         // handle rooms
 
         // need to import IDs so we don't give the new room a conflicting ID
-        var roomNames = newGameData.match(/ROOM \d+/g);
+        var roomIds = newGameData.match(/ROOM \d+\n/g);
 
-        var newRoomId = parseInt(_.last(roomNames).replace(/[^\d]+/g, "")) + 1;
+        roomIds = _.map(roomIds, function(roomId) {
+            return parseInt(roomId.replace(/[^\d]+/g, ""));
+        });
+
+        var newRoomId = _.max(roomIds) + 1;
 
         var newRoomName = $('#roomName').val();
         // remove invalid chars? what's invalid? newlines? are those possible?