diff --git a/Resources/Prototypes/Entities/Effects/chemistry_effects.yml b/Resources/Prototypes/Entities/Effects/chemistry_effects.yml
index 1b80370c3f..71f75f2ad1 100644
--- a/Resources/Prototypes/Entities/Effects/chemistry_effects.yml
+++ b/Resources/Prototypes/Entities/Effects/chemistry_effects.yml
@@ -108,7 +108,7 @@
       fixtures:
       - shape:
           !type:PhysShapeAabb {}
-        mask:
+        layer:
           - Opaque
           - Impassable
           - MobImpassable