diff --git a/maps/mountain_fortress_v2/main.lua b/maps/mountain_fortress_v2/main.lua
index af74c75d..7d40a6ae 100644
--- a/maps/mountain_fortress_v2/main.lua
+++ b/maps/mountain_fortress_v2/main.lua
@@ -241,8 +241,8 @@ local function hidden_biter(entity)
 			unit = surface.create_entity({name = BiterRolls.wave_defense_roll_biter_name(), position = position})
 		end
 
-		if math_random(1, 64) == 1 then
-			BiterHealthBooster.add_boss_unit(unit, m * h * 5 + 1, 0.38)
+		if math_random(1, 128) == 1 then
+			BiterHealthBooster.add_boss_unit(unit, m * h + 5, 0.38)
 		end
 	end
 end