diff --git a/yeti.lua b/yeti.lua
index 999b371..4191409 100644
--- a/yeti.lua
+++ b/yeti.lua
@@ -64,14 +64,14 @@ mobs:register_arrow("pmobs:snowball", {
 		player:punch(self.object, 1.0,  {
 			full_punch_interval=1.0,
 			damage_groups = {fleshy=1},
-		}, 0)
+		}, nil)
 	end,
 
 	hit_mob = function(self, player)
 		player:punch(self.object, 1.0,  {
 			full_punch_interval=1.0,
 			damage_groups = {fleshy=1},
-		}, 0)
+		}, nil)
 	end,
 
 	hit_node = function(self, pos, node)