1 files changed, 9 insertions, 1 deletions

diff --git a/gnu/lib/libdialog/msgbox.c b/gnu/lib/libdialog/msgbox.c
index e405f3b5a26a..fda3b40641a9 100644
--- a/gnu/lib/libdialog/msgbox.c
+++ b/gnu/lib/libdialog/msgbox.c
@@ -29,9 +29,17 @@
  */
 int dialog_msgbox(unsigned char *title, unsigned char *prompt, int height, int width, int pause)
 {
-  int i, x, y, key = 0;
+  int i, j, x, y, key = 0;
   WINDOW *dialog;
 
+  if (height < 0)
+	height = strheight(prompt)+2+2*(!!pause);
+  if (width < 0) {
+	i = strwidth(prompt);
+	j = strwidth(title);
+	width = MAX(i,j)+4;
+  }
+
   /* center dialog box on screen */
   x = (COLS - width)/2;
   y = (LINES - height)/2;