diff --git a/data/json/mapgen/library.json b/data/json/mapgen/library.json
index 6414fe617efaf..48dff302f13b2 100644
--- a/data/json/mapgen/library.json
+++ b/data/json/mapgen/library.json
@@ -537,7 +537,7 @@
         {
           "chunks": [ [ "null", 20 ], [ "roof_4x4_utility", 40 ], [ "roof_6x6_utility", 20 ] ],
           "x": [ 3, 15 ],
-          "y": [ 10, 14 ]
+          "y": [ 8, 11 ]
         }
       ]
     }