diff --git a/bin/app/data/config/buildings.toml b/bin/app/data/config/buildings.toml
index c61a5b9..01df7d3 100644
--- a/bin/app/data/config/buildings.toml
+++ b/bin/app/data/config/buildings.toml
@@ -32,7 +32,6 @@ cost = 15
 player_placeable = true
 construction_time_seconds = 1
 surface_mask = [
-  "AA",
   "A>",
 ]
 
@@ -43,7 +42,7 @@ player_placeable = true
 construction_time_seconds = 1
 surface_mask = [
   "AA ",
-  "AA>",
+  " v",
 ]
 
 [[building]]
@@ -52,9 +51,8 @@ cost = 35
 player_placeable = true
 construction_time_seconds = 1
 surface_mask = [
-  "AAA ",
-  "AAA>",
-  "AAA ",
+  "AA ",
+  "AA>",
 ]
 
 [[building]]