diff --git a/mods/fossils.js b/mods/fossils.js
index 2661c3ce..b6d2024e 100644
--- a/mods/fossils.js
+++ b/mods/fossils.js
@@ -411,3 +411,4 @@ elements.algae.reactions.quicklime = { "elem1": ["oil","methane","methane","coal
 elements.algae.reactions.slaked_lime = { "elem1": ["oil","methane","methane","coal"], tempMin:280, chance:0.000025 };
 
 delete elements.dirt.reactions.bone
+delete elements.rock.reactions.dead_plant