diff --git a/minetestforfun_game/mods/default/trees.lua b/minetestforfun_game/mods/default/trees.lua
index dda0c081..e1b9d3e1 100755
--- a/minetestforfun_game/mods/default/trees.lua
+++ b/minetestforfun_game/mods/default/trees.lua
@@ -157,6 +157,7 @@ local function add_trunk_and_leaves(data, a, pos, tree_cid, leaves_cid,
 	end
 end
 
+default.add_trunk_and_leaves = add_trunk_and_leaves -- MFF edit 2016-08-21
 
 -- Apple tree
 
diff --git a/mods/mff/mff_classic/abms.lua b/mods/mff/mff_classic/abms.lua
index f5bab914..a4f2c5b9 100644
--- a/mods/mff/mff_classic/abms.lua
+++ b/mods/mff/mff_classic/abms.lua
@@ -1,7 +1,8 @@
 local modname = minetest.get_current_modname()
+local thismod = _G[modname]
 
 minetest.register_abm({
-  nodenames = {'default:cherry_sapling', modname .. 'mg_cherry_sapling'},
+  nodenames = {modname .. ':cherry_sapling', modname .. 'mg_cherry_sapling'},
   interval = 80,
   chance = 3,
   action = function(pos, node)
@@ -14,6 +15,6 @@ minetest.register_abm({
     end
 
     minetest.remove_node({x=pos.x, y=pos.y, z=pos.z})
-    default.grow_cherry_tree(pos, false, 'default:cherry_tree', 'default:cherry_blossom_leaves')
+    thismod.grow_cherry_tree(pos, false, modname .. ':cherry_tree', modname .. ':cherry_blossom_leaves')
   end,
 })
diff --git a/mods/mff/mff_classic/mapgen.lua b/mods/mff/mff_classic/mapgen.lua
index d0a425ac..38baaf7f 100644
--- a/mods/mff/mff_classic/mapgen.lua
+++ b/mods/mff/mff_classic/mapgen.lua
@@ -224,7 +224,7 @@ function thismod.generate_nyancats(minp, maxp, seed)
       local y0 = pr:next(minp.y, maxp.y)
       local z0 = pr:next(minp.z, maxp.z)
       local p0 = {x = x0, y = y0, z = z0}
-      default.make_nyancat(p0, pr:next(0, 3), pr:next(10, 15))
+      thismod.make_nyancat(p0, pr:next(0, 3), pr:next(10, 15))
     end
   end
 end
diff --git a/mods/mff/mff_classic/trees.lua b/mods/mff/mff_classic/trees.lua
index 49b9aeff..67b588ed 100644
--- a/mods/mff/mff_classic/trees.lua
+++ b/mods/mff/mff_classic/trees.lua
@@ -1,4 +1,5 @@
 local modname = minetest.get_current_modname()
+local thismod = _G[modname]
 
 -- From BFD:
 
@@ -24,7 +25,7 @@ minetest.register_on_generated(function(minp, maxp, seed)
         local p_pos = area:index(x,y,z)
         local content_id = data[p_pos]
         if content_id == c_mg_cherry_sapling then
-          minetest.after(1, default.grow_cherry_tree,
+          minetest.after(1, thismod.grow_cherry_tree,
             {x=x, y=y, z=z},
             false,
             modname .. ':cherry_tree',
@@ -40,7 +41,7 @@ minetest.register_on_generated(function(minp, maxp, seed)
   minetest.log('action', trees_grown..geninfo)
 end)
 
-function default.grow_cherry_tree(pos, is_apple_tree, trunk_node, leaves_node)
+function thismod.grow_cherry_tree(pos, is_apple_tree, trunk_node, leaves_node)
   --[[
     NOTE: Tree-placing code is currently duplicated in the engine
     and in games that have saplings; both are deprecated but not
@@ -60,7 +61,7 @@ function default.grow_cherry_tree(pos, is_apple_tree, trunk_node, leaves_node)
   local a = VoxelArea:new({MinEdge = minp, MaxEdge = maxp})
   local data = vm:get_data()
 
-  add_trunk_and_leaves(data, a, pos, c_tree, c_leaves, height, 2, 8, is_apple_tree)
+  default.add_trunk_and_leaves(data, a, pos, c_tree, c_leaves, height, 2, 8, is_apple_tree)
 
   vm:set_data(data)
   vm:write_to_map()