diff --git a/src/xrc/xh_sizer.cpp b/src/xrc/xh_sizer.cpp
index 4b5f0b03aa..f5e2dcc466 100644
--- a/src/xrc/xh_sizer.cpp
+++ b/src/xrc/xh_sizer.cpp
@@ -78,6 +78,7 @@ wxSizerXmlHandler::wxSizerXmlHandler()
     XRC_ADD_STYLE(wxALIGN_CENTRE_VERTICAL);
 
     XRC_ADD_STYLE(wxFIXED_MINSIZE);
+    XRC_ADD_STYLE(wxRESERVE_SPACE_EVEN_IF_HIDDEN);
 }