diff --git a/mods/ENTITIES/mcl_mobs/api/api.lua b/mods/ENTITIES/mcl_mobs/api/api.lua
index 0d2174155..4fc5da11d 100644
--- a/mods/ENTITIES/mcl_mobs/api/api.lua
+++ b/mods/ENTITIES/mcl_mobs/api/api.lua
@@ -249,6 +249,7 @@ function mobs:register_mob(name, def)
 		env_damage_timer = 0,
 		tamed = false,
 		pause_timer = 0,
+		damage_timer = 0, --for determining damage cooldown aka brief immunity
 		gotten = false,
 		reach = def.reach or 3,
 		htimer = 0,