diff --git a/res/models/stairs.xml b/res/models/stairs.xml
index ad36aed7..9eeac7a1 100644
--- a/res/models/stairs.xml
+++ b/res/models/stairs.xml
@@ -1,6 +1,6 @@
 <model>
-    <box from="0,0,0" to="1,0.5,1" delete="top,north"/>
-    <box from="0,0.5,0.5" to="1,1,1" delete="bottom,north"/>
-    <rect from="0,0.5,0" right="1,0,0" up="0,0,0.5"/>
-    <rect from="1,0,1" right="-1,0,0" up="0,1,0"/>
+    <box from="0,0,0" to="1,0.5,1" delete="top,south"/>
+    <box from="0,0.5,0" to="1,1,0.5" delete="bottom,south"/>
+    <rect from="0,0.5,0.5" right="1,0,0" up="0,0,0.5"/>
+    <rect from="0,0,0" right="1,0,0" up="0,1,0"/>
 </model>