diff --git a/doc/emacs/frames.texi b/doc/emacs/frames.texi
index 93a6cd70d3f..8a255fa40fb 100644
--- a/doc/emacs/frames.texi
+++ b/doc/emacs/frames.texi
@@ -232,7 +232,7 @@ scrolling with the @key{Ctrl} modifier.  When this mode is enabled,
 mouse wheel produces special events like @code{wheel-up} and
 @code{wheel-down}.  (Some older systems report them as @code{mouse-4}
 and @code{mouse-5}.)  If the mouse has a horizontal scroll wheel, it
-produces @code{wheel-left} and @code{wheel-right} events as well..
+produces @code{wheel-left} and @code{wheel-right} events as well.
 
 @vindex mouse-wheel-scroll-amount-horizontal
 Emacs also supports horizontal scrolling with the @key{Shift}