diff --git a/data/json/mapgen/library.json b/data/json/mapgen/library.json
index a2b8b008ae2c..270306a89950 100644
--- a/data/json/mapgen/library.json
+++ b/data/json/mapgen/library.json
@@ -155,8 +155,8 @@
         "          -......Z..-   ",
         "          -.........-   ",
         "          -..R......-   ",
-        "          -.........-   ",
         "          -......U..-   ",
+        "          -.........-   ",
         "          -----------   "
       ],
       "palettes": [ "roof_palette" ],