1 files changed, 2 insertions, 0 deletions

diff --git a/src/xterm.c b/src/xterm.c
index 1c07c56241e..2070c65d76a 100644
--- a/src/xterm.c
+++ b/src/xterm.c
@@ -6097,6 +6097,8 @@ handle_one_xevent (dpyinfo, eventp, finish, hold_quit)
 
       f = x_any_window_to_frame (dpyinfo, event.xkey.window);
 
+      /* If mouse-highlight is an integer, input clears out
+         mouse highlighting.  */
       if (!dpyinfo->mouse_face_hidden && INTEGERP (Vmouse_highlight)
           && (f == 0
               || !EQ (f->tool_bar_window, dpyinfo->mouse_face_window)))