diff --git a/code/modules/mob/living/carbon/human/human_movement.dm b/code/modules/mob/living/carbon/human/human_movement.dm
index 9ab7b541b84..51a68c4da91 100644
--- a/code/modules/mob/living/carbon/human/human_movement.dm
+++ b/code/modules/mob/living/carbon/human/human_movement.dm
@@ -16,7 +16,7 @@
 
 	if (istype(loc, /turf/space)) return -1 // It's hard to be slowed down in space by... anything
 
-	var/health_deficiency = (100 - health - halloss)
+	var/health_deficiency = (100 - health + halloss)
 	if(health_deficiency >= 40) tally += (health_deficiency / 25)
 
 	var/hungry = (500 - nutrition)/5 // So overeat would be 100 and default level would be 80