diff --git a/code/modules/organs/internal/brain.dm b/code/modules/organs/internal/brain.dm
index 0e66234da0..d4e735b533 100644
--- a/code/modules/organs/internal/brain.dm
+++ b/code/modules/organs/internal/brain.dm
@@ -131,7 +131,7 @@ GLOBAL_LIST_BOILERPLATE(all_brain_organs, /obj/item/organ/internal/brain)
 	..()
 
 /obj/item/organ/internal/brain/proc/get_control_efficiency()
-	. = 1 - (round(damage / max_damage * 10) / 10)
+	. = max(0, 1 - (round(damage / max_damage * 10) / 10))
 
 	return .