diff --git a/ChangeLog b/ChangeLog
index f9d5fc9..262d481 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2003-01-29  Glynn Foster  <glynn.foster@sun.com>
+
+	* src/main.c: Don't do a g_assert_not_reached () if we don't have
+	any dialog types.
+
 2003-01-29  Glynn Foster  <glynn.foster@sun.com>
 
 	* README: Update
diff --git a/src/main.c b/src/main.c
index 1339923..233aba5 100644
--- a/src/main.c
+++ b/src/main.c
@@ -1020,6 +1020,10 @@ main (gint argc, gchar **argv) {
                 case MODE_ABOUT:
                         zenity_about (results->data);
                         break;
+                case MODE_LAST:
+                        g_printerr (_("You must specify a dialog type. See 'zenity --help' for details\n"));
+                        zenity_free_parsing_options ();
+                        exit (-1);
 		default:
 			g_assert_not_reached ();
 			zenity_free_parsing_options ();