diff --git a/gtk2_ardour/ardour_ui.cc b/gtk2_ardour/ardour_ui.cc
index 4dcb4eb5fa..fd75481af5 100644
--- a/gtk2_ardour/ardour_ui.cc
+++ b/gtk2_ardour/ardour_ui.cc
@@ -27,8 +27,6 @@
 #include <cerrno>
 #include <fstream>
 
-#include <boost/locale.hpp>
-
 #include <stdint.h>
 #include <fcntl.h>
 #include <signal.h>