diff --git a/Resources/Prototypes/Entities/Structures/Walls/asteroid.yml b/Resources/Prototypes/Entities/Structures/Walls/asteroid.yml
index 87fd718115..56edc1872e 100644
--- a/Resources/Prototypes/Entities/Structures/Walls/asteroid.yml
+++ b/Resources/Prototypes/Entities/Structures/Walls/asteroid.yml
@@ -27,3 +27,16 @@
   - type: Appearance
     visuals:
     - type: AsteroidRockVisualizer
+  - type: Fixtures
+    fixtures:
+    - shape:
+        !type:PhysShapeAabb
+          bounds: "-0.5,-0.5,0.5,0.5"
+      mass: 100
+      mask:
+      - Impassable
+      layer:
+      - Opaque
+      - Impassable
+      - VaultImpassable
+      - SmallImpassable