diff --git a/gtk2_ardour/ambiguous_file_dialog.cc b/gtk2_ardour/ambiguous_file_dialog.cc
index 0eae3617c5..7d57c67660 100644
--- a/gtk2_ardour/ambiguous_file_dialog.cc
+++ b/gtk2_ardour/ambiguous_file_dialog.cc
@@ -43,6 +43,7 @@ AmbiguousFileDialog::AmbiguousFileDialog (const string& file, const vector<strin
 	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 ();
 }