diff --git a/Resources/Prototypes/Entities/buildings/airlock_base.yml b/Resources/Prototypes/Entities/buildings/airlock_base.yml
index 25e7c54df8..d0c5a3aafb 100644
--- a/Resources/Prototypes/Entities/buildings/airlock_base.yml
+++ b/Resources/Prototypes/Entities/buildings/airlock_base.yml
@@ -27,6 +27,7 @@
     # TODO: Fix that.
     aabb: -0.45, -0.45, 0.45, 0.45
   - type: Collidable
+    mask: 2
   - type: Door
   - type: Appearance
     visuals: