diff --git a/mummy.lua b/mummy.lua
index 4364cce..42ebf6c 100644
--- a/mummy.lua
+++ b/mummy.lua
@@ -284,20 +284,23 @@ MUMMY_DEF.on_step = function(self, dtime)
 	if self.state == 1 then
 		self.yawwer = true
 		self.attacker = ""
-		for  _,object in ipairs(minetest.get_objects_inside_radius(self.object:get_pos(), 4)) do
-			if object:is_player() then
-				self.yawwer = false
-				local NPC = self.object:get_pos()
-				local PLAYER = object:get_pos()
-				self.vec = {x=PLAYER.x-NPC.x, y=PLAYER.y-NPC.y, z=PLAYER.z-NPC.z}
-				self.yaw = math.atan(self.vec.z/self.vec.x)+math.pi^2
-				if PLAYER.x > NPC.x then
-					self.yaw = self.yaw + math.pi
-				end
-				self.yaw = self.yaw - 2
-				self.object:set_yaw(self.yaw)
-				self.attacker = object
-			end
+		local pos_obj = self.object:get_pos()
+		if pos_obj then
+		   for  _,object in ipairs(minetest.get_objects_inside_radius(pos_obj, 4)) do
+		      if object:is_player() then
+			 self.yawwer = false
+			 local NPC = self.object:get_pos()
+			 local PLAYER = object:get_pos()
+			 self.vec = {x=PLAYER.x-NPC.x, y=PLAYER.y-NPC.y, z=PLAYER.z-NPC.z}
+			 self.yaw = math.atan(self.vec.z/self.vec.x)+math.pi^2
+			 if PLAYER.x > NPC.x then
+			    self.yaw = self.yaw + math.pi
+			 end
+			 self.yaw = self.yaw - 2
+			 self.object:set_yaw(self.yaw)
+			 self.attacker = object
+		      end
+		   end
 		end
 
 		if self.attacker == "" and self.turn_timer > math.random(1,4) then
@@ -306,7 +309,8 @@ MUMMY_DEF.on_step = function(self, dtime)
 			self.turn_timer = 0
 			self.direction = {x = math.sin(self.yaw)*-1, y = -20, z = math.cos(self.yaw)}
 		end
-		self.object:set_velocity({x=0,y=self.object:get_velocity().y,z=0})
+		local old_vel = self.object:get_velocity()
+		self.object:set_velocity({x=0,y=old_vel and old_vel.y or 0,z=0})
 		if self.npc_anim ~= ANIM_STAND then
 			self.anim = get_animations()
 			self.object:set_animation({x=self.anim.stand_START,y=self.anim.stand_END}, mummy_animation_speed, mummy_animation_blend)
@@ -321,7 +325,12 @@ MUMMY_DEF.on_step = function(self, dtime)
 	if self.state == 2 then
 
 		if self.direction ~= nil then
-			self.object:set_velocity({x=self.direction.x*mummy_chillaxin_speed,y=self.object:get_velocity().y,z=self.direction.z*mummy_chillaxin_speed})
+		   local old_vel = self.object:get_velocity()
+		   self.object:set_velocity({
+			 x=self.direction.x*mummy_chillaxin_speed,
+			 y=old_vel and old_vel.y or 0,
+			 z=self.direction.z*mummy_chillaxin_speed,
+		   })
 		end
 		if self.turn_timer > math.random(1,4) and not self.attacker then
 			self.yaw = 360 * math.random()