diff --git a/doc/lispref/frames.texi b/doc/lispref/frames.texi
index fccc40d4ccc..996399fb19a 100644
--- a/doc/lispref/frames.texi
+++ b/doc/lispref/frames.texi
@@ -4720,6 +4720,7 @@ to encoding or decoding by any coding system.
 
 @node Yanking Media
 @section Yanking Media
+@cindex yank media from window-system selections
 
   Data saved within window system selections is not restricted to
 plain text.  It is possible for selection data to encompass images or