diff --git a/src/xrc/xh_aui.cpp b/src/xrc/xh_aui.cpp
index 543b1f2984..e2a75242c6 100644
--- a/src/xrc/xh_aui.cpp
+++ b/src/xrc/xh_aui.cpp
@@ -51,6 +51,7 @@ wxAuiXmlHandler::wxAuiXmlHandler()
     XRC_ADD_STYLE(wxAUI_NB_CLOSE_BUTTON);
     XRC_ADD_STYLE(wxAUI_NB_CLOSE_ON_ACTIVE_TAB);
     XRC_ADD_STYLE(wxAUI_NB_CLOSE_ON_ALL_TABS);
+    XRC_ADD_STYLE(wxAUI_NB_MIDDLE_CLICK_CLOSE);
     XRC_ADD_STYLE(wxAUI_NB_TOP);
     XRC_ADD_STYLE(wxAUI_NB_BOTTOM);