diff --git a/src/fst/morphology/root.lexc b/src/fst/morphology/root.lexc
index 1271f31c..f8ebbec6 100644
--- a/src/fst/morphology/root.lexc
+++ b/src/fst/morphology/root.lexc
@@ -110,6 +110,8 @@ Multichar_Symbols !!≈!!@CODE@ / Analysis symbols
  +Err/Dial !!≈ * _@CODE@_ * The form is non-standard although it may well be central dialect, e.g. стякшемс
  +Err/Lex !!≈ * _@CODE@_ * The lemma is not a Moksha word
 
+ +URL !!≈ * @CODE@ * For tagging URLs
+
 !! # Dialect tags
  +Dial    !!≈ * @CODE@ * No specification
     !! Specific to some dialects