diff --git a/nano.c b/nano.c
index 5e1afa01..658573b1 100644
--- a/nano.c
+++ b/nano.c
@@ -2359,7 +2359,12 @@ void do_toggle(int which)
 	edit_refresh();
 	display_main_list();
 	break;
-
+    case TOGGLE_DOS_KEY:
+	UNSET(MAC_FILE);
+	break;
+    case TOGGLE_MAC_KEY:
+	UNSET(DOS_FILE);
+	break;
     }
 
     if (!ISSET(toggles[which].flag)) {