diff --git a/doc/lispref/ChangeLog b/doc/lispref/ChangeLog
index 768a82a6550..3b664884e89 100644
--- a/doc/lispref/ChangeLog
+++ b/doc/lispref/ChangeLog
@@ -1,6 +1,6 @@
 2013-10-27  Xue Fuqiao  <xfq.free@gmail.com>
 
-	* display.texi (Image Descriptors): Add an index for edge-detection algorithms.
+	* display.texi (Image Descriptors): Improve indexing.
 
 2013-10-26  Xue Fuqiao  <xfq.free@gmail.com>
 
diff --git a/doc/lispref/display.texi b/doc/lispref/display.texi
index 3b64d54bbfa..4d7d7bf560d 100644
--- a/doc/lispref/display.texi
+++ b/doc/lispref/display.texi
@@ -4497,6 +4497,7 @@ This specifies the pointer shape when the mouse pointer is over this
 image.  @xref{Pointer Shape}, for available pointer shapes.
 
 @item :map @var{map}
+@cindex image maps
 This associates an image map of @dfn{hot spots} with this image.
 
 An image map is an alist where each element has the format