diff --git a/modules/biter_health_booster.lua b/modules/biter_health_booster.lua
index 9bf0f4c1..44dfc2df 100644
--- a/modules/biter_health_booster.lua
+++ b/modules/biter_health_booster.lua
@@ -98,8 +98,11 @@ local function on_entity_damaged(event)
 		end
 	end
 
+  --Calculate current actual health, accounting for regeneration
+  local current_health = biter.health * (1 / health_pool[2])
+
 	--Reduce health pool
-	health_pool[1] = health_pool[1] - event.final_damage_amount
+	health_pool[1] = current_health - event.final_damage_amount
 
 	--Set entity health relative to health pool
 	biter.health = health_pool[1] * health_pool[2]