diff --git a/README.md b/README.md
index 5b058db..9c675e5 100644
--- a/README.md
+++ b/README.md
@@ -14,6 +14,14 @@ Changes between the original and the fork:
   Arial font by free Noto font (that's why this is a hard fork with an
   entirely rewritten Git history)
 
+## Maintained Styls
+
+Some styles in this repository are unmaintained (and broken). The following
+styles are maintained:
+
+* [toner.mml](toner.mml)
+
+
 # Toner
 
 "Toner" is the name of Stamen's black and white map tiles. It was originally
diff --git a/toner.yml b/toner.mml
similarity index 100%
rename from toner.yml
rename to toner.mml