diff --git a/foundrytoencounter.py b/foundrytoencounter.py
index 48525de..22aabff 100644
--- a/foundrytoencounter.py
+++ b/foundrytoencounter.py
@@ -801,6 +801,8 @@ def createMap(map, mapgroup):
         if "tiles" in map:
             for i in range(len(map["tiles"])):
                 image = map["tiles"][i]
+                if image["img"] is None:
+                    continue
                 if "scale" not in image:
                     image["scale"] = 1
                 image["img"] = urllib.parse.unquote(image["img"])