diff --git a/trunks/generating.lua b/trunks/generating.lua
index eeb635c..f693df6 100644
--- a/trunks/generating.lua
+++ b/trunks/generating.lua
@@ -44,7 +44,7 @@ abstract_trunks.place_twig = function(pos)
 
 --	small twigs
 	if twig_size <= 16 then
-		minetest.swap_node(right_here, {name="trunks:twig_"..random(1,4), param2=random(0,3)})
+		minetest.swap_node(right_here, {name="trunks:twig_"..math.random(1,4), param2=math.random(0,3)})
 	end
 --	big twigs
 	if Big_Twigs == true then
@@ -163,7 +163,7 @@ abstract_trunks.place_twig = function(pos)
 			end
 		end
 	elseif twig_size <= 25 then
-		minetest.swap_node(right_here, {name="trunks:twig_"..random(12,13), param2=random(0,3)})
+		minetest.swap_node(right_here, {name="trunks:twig_"..math.random(12,13), param2=math.random(0,3)})
 	end
 	end
 end
@@ -270,10 +270,10 @@ abstract_trunks.place_trunk = function(pos)
 			local	MoD =			TRuNKS[i][1]
 			local	TRuNK =			TRuNKS[i][2]
 			local	NR =			TRuNKS[i][3]
-			local	chance =		random(1, 17)
-			local	length =		random(3,5)
+			local	chance =		math.random(1, 17)
+			local	length =		math.random(3,5)
 			if chance == NR then
-				local trunk_type = random(1,3)
+				local trunk_type = math.random(1,3)
 				if trunk_type == 1 then
 					if minetest.get_modpath(MoD) ~= nil then
 						minetest.swap_node(right_here, {name=MoD..":"..TRuNK})
@@ -509,7 +509,7 @@ end
 if Roots == true then -- see settings.txt
 
 abstract_trunks.grow_roots = function(pos)
-	local twig_size		= random(1,27)
+	local twig_size		= math.random(1,27)
 
 	local right_here	= {x=pos.x  , y=pos.y  , z=pos.z  }
 	local below		= {x=pos.x  , y=pos.y-1, z=pos.z  }