diff --git a/code/modules/surgery/organs/appendix.dm b/code/modules/surgery/organs/appendix.dm
index fd46860ba7..1ad55b12dd 100644
--- a/code/modules/surgery/organs/appendix.dm
+++ b/code/modules/surgery/organs/appendix.dm
@@ -13,7 +13,7 @@
 
 /obj/item/organ/appendix/on_life()
 	. = ..()
-	if(!.)
+	if(.)
 		return
 	owner.adjustToxLoss(4, TRUE, TRUE)	//forced to ensure people don't use it to gain tox as slime person