diff --git a/docs/frontends/webapi.rst b/docs/frontends/webapi.rst
index aa62fa119..120847641 100644
--- a/docs/frontends/webapi.rst
+++ b/docs/frontends/webapi.rst
@@ -1061,6 +1061,8 @@ Viewing/Downloading a File
  this form can *only* be used with file caps; it is an error to use a
  directory cap after the /named/ prefix.
 
+ URLs may also use /file/$FILECAP/FILENAME as a synonym for
+ /named/$FILECAP/FILENAME.
 
 Getting Information About A File Or Directory (as HTML)
 -------------------------------------------------------