diff --git a/src/xrc/xh_sizer.cpp b/src/xrc/xh_sizer.cpp
index 44a6347bce..21de7c64e2 100644
--- a/src/xrc/xh_sizer.cpp
+++ b/src/xrc/xh_sizer.cpp
@@ -79,6 +79,7 @@ wxSizerXmlHandler::wxSizerXmlHandler()
 
     XRC_ADD_STYLE(wxADJUST_MINSIZE);
     XRC_ADD_STYLE(wxFIXED_MINSIZE);
+    XRC_ADD_STYLE(wxRESERVE_SPACE_EVEN_IF_HIDDEN);
 }