diff --git a/include/wx/gtk/private.h b/include/wx/gtk/private.h
index 979e7b08bb..05699a287a 100644
--- a/include/wx/gtk/private.h
+++ b/include/wx/gtk/private.h
@@ -27,6 +27,8 @@
     #define wxGTK_CONV_SYS(s) wxGTK_CONV(s)
     #define wxGTK_CONV_BACK(s) wxConvUTF8.cMB2WX(s)
 #else
+    #include "wx/font.h"
+
     // convert the text in given encoding to UTF-8 used by wxGTK
     extern wxCharBuffer
     wxConvertToGTK(const wxString& s,