Index: gtk2_ardour/ambiguous_file_dialog.cc
===================================================================
--- gtk2_ardour/ambiguous_file_dialog.cc	(revision 10475)
+++ gtk2_ardour/ambiguous_file_dialog.cc	(working copy)
@@ -43,6 +43,7 @@
 	get_vbox()->pack_start (*manage (new Label (_("\n\nPlease select the path that you want to get the file from."))));
 
 	add_button (_("Done"), RESPONSE_OK);
+	set_default_response(RESPONSE_OK);
 
 	show_all ();
 }