--- audacity-Audacity-2.3.2/src/prefs/PrefsDialog.cpp.1	2019-08-10 10:49:46.607899178 +0000
+++ audacity-Audacity-2.3.2/src/prefs/PrefsDialog.cpp	2019-08-10 10:50:01.034660081 +0000
@@ -29,6 +29,7 @@
 #include <wx/intl.h>
 #include <wx/listbox.h>
 #include <wx/sizer.h>
+#include <wx/treectrl.h>
 
 #include <wx/listbook.h>