diff --git a/README.md b/README.md
index 2723747..b4beaa7 100644
--- a/README.md
+++ b/README.md
@@ -1 +1,3 @@
 # minetest-carpets
+
+see https://forum.minetest.net/viewtopic.php?f=9&t=15459#p232311
diff --git a/init.lua b/init.lua
index 1e76346..27751b7 100644
--- a/init.lua
+++ b/init.lua
@@ -20,6 +20,7 @@ function carpet.enabledfilter(name, def)
 	   def.drawtype == "firelike"   or
            def.drawtype == "airlike"    or 
            def.drawtype == "plantlike"  or 
+           def.drawtype == "nodebox"  or 
 	   def.drawtype == "raillike"   then
                 return false
         end