diff --git a/gtk2_ardour/x11.cc b/gtk2_ardour/x11.cc
new file mode 100644
index 0000000000..330d459abc
--- /dev/null
+++ b/gtk2_ardour/x11.cc
@@ -0,0 +1,6 @@
+#include <ardour_ui.h>
+
+void
+ARDOUR_UI::platform_specific ()
+{
+}