diff --git a/mods/ENTITIES/mcl_mobs/combat.lua b/mods/ENTITIES/mcl_mobs/combat.lua
index a63aa6940..cdb6e548e 100644
--- a/mods/ENTITIES/mcl_mobs/combat.lua
+++ b/mods/ENTITIES/mcl_mobs/combat.lua
@@ -537,8 +537,10 @@ function mob_class:on_punch(hitter, tflp, tool_capabilities, dir)
 	local is_player = hitter:is_player()
 
 	if is_player then
+		local time_diff = time_now - self.invul_timestamp
+
 		-- check for invulnerability time in microseconds (0.5 second)
-		if time_now - self.invul_timestamp <= 500000 then
+		if time_diff <= 500000 and time_diff >= 0 then
 			return
 		end