diff --git a/data/json/mapgen/house/house01.json b/data/json/mapgen/house/house01.json
index 15c81fd7c757b..7ca000fa7c89f 100644
--- a/data/json/mapgen/house/house01.json
+++ b/data/json/mapgen/house/house01.json
@@ -75,9 +75,9 @@
     "object": {
       "fill_ter": "t_floor",
       "rows": [
-        "...::::::M..............",
-        "...::::::cccccc.........",
-        "...::::::CC.CCcCC..CC...",
+        "...ccccccM..............",
+        "...cccccccccccc.........",
+        "...ccccccCC.CCcCC..CC...",
         ".C#``````##o##*##oo##...",
         ".C#``````|X,,|,|,,,,#...",
         ".C#``````|,,,|,+,,,,o...",