diff --git a/capplets/file-types/file-types-capplet-dialogs.c b/capplets/file-types/file-types-capplet-dialogs.c
index c6b399584..03747f2a6 100644
--- a/capplets/file-types/file-types-capplet-dialogs.c
+++ b/capplets/file-types/file-types-capplet-dialogs.c
@@ -676,7 +676,7 @@ static void
 display_upper_case_dialog (void)
 {
 	char *message;
-	GtkWidget *dialog;
+	GnomeDialog *dialog;
 
 	message = _("The MIME type entered contained upper case characters. "
 		    "Upper case characters were changed to lower case for you.");