1 files changed, 4 insertions, 1 deletions

diff --git a/src/fns.c b/src/fns.c
index 087a050f580..bf7b715223e 100644
--- a/src/fns.c
+++ b/src/fns.c
@@ -5229,7 +5229,10 @@ Used by `featurep' and `require', and altered by `provide'.  */);
   DEFVAR_BOOL ("use-dialog-box", &use_dialog_box,
     doc: /* *Non-nil means mouse commands use dialog boxes to ask questions.
 This applies to `y-or-n-p' and `yes-or-no-p' questions asked by commands
-invoked by mouse clicks and mouse menu items.  */);
+invoked by mouse clicks and mouse menu items.
+
+On some platforms, file selection dialogs are also enabled if this is
+non-nil.  */);
   use_dialog_box = 1;
 
   DEFVAR_BOOL ("use-file-dialog", &use_file_dialog,