diff --git a/src/Mod/Arch/CMakeLists.txt b/src/Mod/Arch/CMakeLists.txt
index e55bf558f..8d067edb6 100644
--- a/src/Mod/Arch/CMakeLists.txt
+++ b/src/Mod/Arch/CMakeLists.txt
@@ -20,6 +20,7 @@ SET(Arch_SRCS
     ArchAxis.py
     ArchVRM.py
     ArchRoof.py
+    ArchStairs.py
     importWebGL.py
     ArchSpace.py
     TestArch.py
diff --git a/src/WindowsInstaller/ModArch.wxi b/src/WindowsInstaller/ModArch.wxi
index ea5c0c71d..8fb6c92f7 100644
--- a/src/WindowsInstaller/ModArch.wxi
+++ b/src/WindowsInstaller/ModArch.wxi
@@ -47,6 +47,7 @@
             <File Id="importWebGLPy" Name="importWebGL.py" DiskId="1" />
             <File Id="ArchSpacePy" Name="ArchSpace.py" DiskId="1" />
             <File Id="TestArchPy" Name="TestArch.py" DiskId="1" />
+            <File Id="ArchStairsPy" Name="ArchStairs.py" DiskId="1" />
         </Component>
     </Directory>
 </Include>