diff --git a/rocks/init.lua b/rocks/init.lua
index f05da60..638fea1 100644
--- a/rocks/init.lua
+++ b/rocks/init.lua
@@ -22,6 +22,8 @@ rocksl.GetNextSeed=function()
  return rocksl.seedseq
 end
 
+minetest.clear_registered_ores()
+
 local modpath=minetest.get_modpath(minetest.get_current_modname())
 
 dofile(modpath.."/sed.lua")
diff --git a/rocks/sed.lua b/rocks/sed.lua
index dab6298..eecf816 100644
--- a/rocks/sed.lua
+++ b/rocks/sed.lua
@@ -89,7 +89,7 @@ do
    def.node_stone="rocks:limestone"
    def.depth_filler=15
   end
-  if (def.node_stone=="default:stone") or (not def.node_stone) then def.node_stone="mapgen_stone" end
+  if (def.node_stone=="default:stone") or (not def.node_stone) then def.node_stone="rocks:basalt" end
   -- deactivate the added and removed shore-thing of MGv7
   -- to fix weirid sand layers underground
   if btype=="lowland" then -- fixme: does this affect beach/ocean too?