diff --git a/contrib/src/xml/xh_bttn.cpp b/contrib/src/xml/xh_bttn.cpp
index b0c31f12c1..7e742067cf 100644
--- a/contrib/src/xml/xh_bttn.cpp
+++ b/contrib/src/xml/xh_bttn.cpp
@@ -26,6 +26,10 @@
 wxButtonXmlHandler::wxButtonXmlHandler() 
 : wxXmlResourceHandler() 
 {
+    ADD_STYLE(wxBU_LEFT);
+    ADD_STYLE(wxBU_RIGHT);
+    ADD_STYLE(wxBU_TOP);
+    ADD_STYLE(wxBU_BOTTOM);
     AddWindowStyles();
 }