diff --git a/code/modules/mob/living/simple_animal/slime/slime.dm b/code/modules/mob/living/simple_animal/slime/slime.dm
index 0ecace17a6e..e2caeb9bb2b 100644
--- a/code/modules/mob/living/simple_animal/slime/slime.dm
+++ b/code/modules/mob/living/simple_animal/slime/slime.dm
@@ -61,7 +61,7 @@
 	var/list/speech_buffer = list() // Last phrase said near it and person who said it
 
 	var/mood = "" // To show its face
-	var/mutator_used = 0 //So you can't shove a dozen mutators into a single slime
+	var/mutator_used = FALSE //So you can't shove a dozen mutators into a single slime
 
 	///////////TIME FOR SUBSPECIES