diff --git a/Resources/Prototypes/Entities/Structures/Windows/window.yml b/Resources/Prototypes/Entities/Structures/Windows/window.yml
index b7241b3d27..0c8ada8f76 100644
--- a/Resources/Prototypes/Entities/Structures/Windows/window.yml
+++ b/Resources/Prototypes/Entities/Structures/Windows/window.yml
@@ -257,6 +257,7 @@
   - type: Tag
     tags:
     - Diagonal
+    - Window
   - type: IconSmooth
     mode: Diagonal
     key: windows