diff --git a/ddimport.js b/ddimport.js
index 2772919..5146cdc 100644
--- a/ddimport.js
+++ b/ddimport.js
@@ -113,7 +113,7 @@ class DDImporter {
         let portalPoint2 = [portalCenterPoint[0] - portal.radius*portalDirection[0], portalCenterPoint[1] - portal.radius*portalDirection[1]] ;
         alldoors.push([portalPoint1, portalPoint2])
         let allwalls_new = []
-        for (let lineindex in allwalls){
+        for (let lineindex = 0; lineindex < allwalls.length; lineindex+=1){
           let line = allwalls[lineindex]
           if (this.pointIsOnLine(portalCenterPoint,line)){
             let endpoint1 = this.getNearerPoint(line[0], [portalPoint1, portalPoint2])
diff --git a/module.json b/module.json
index aa69ecb..95f36a4 100644
--- a/module.json
+++ b/module.json
@@ -2,7 +2,7 @@
   "name": "dd-import",
   "title": "DungeonDraft Importer",
   "description": "Imports scene elements from Dungeon Draft map files",
-  "version": "0.4.13",
+  "version": "0.4.15",
   "authors": [
     {
       "name": "Moo Man"