diff --git a/Resources/Prototypes/Entities/Effects/chemistry_effects.yml b/Resources/Prototypes/Entities/Effects/chemistry_effects.yml
index ee300e9aea..4f925ed311 100644
--- a/Resources/Prototypes/Entities/Effects/chemistry_effects.yml
+++ b/Resources/Prototypes/Entities/Effects/chemistry_effects.yml
@@ -70,7 +70,6 @@
       state: foam-west
   - type: SmoothEdge
   - type: IconSmooth
-    key: walls
     mode: NoSprite
   - type: FoamVisuals
     animationTime: 0.6