diff --git a/code/modules/atmospherics/gasmixtures/reactions.dm b/code/modules/atmospherics/gasmixtures/reactions.dm
index 689abbc388..15c2f1e4a6 100644
--- a/code/modules/atmospherics/gasmixtures/reactions.dm
+++ b/code/modules/atmospherics/gasmixtures/reactions.dm
@@ -191,7 +191,7 @@
 
 //fusion: a terrible idea that was fun but broken. Now reworked to be less broken and more interesting. Again.
 /datum/gas_reaction/fusion
-	exclude = FALSE
+	exclude = TRUE
 	priority = 2
 	name = "Plasmic Fusion"
 	id = "fusion"