diff --git a/contrib/src/xrc/xmlres.cpp b/contrib/src/xrc/xmlres.cpp
index b7c0bc870e..4d6b486ad6 100644
--- a/contrib/src/xrc/xmlres.cpp
+++ b/contrib/src/xrc/xmlres.cpp
@@ -1127,7 +1127,10 @@ void wxXmlResourceHandler::SetupWindow(wxWindow *wnd)
     //FIXME : add cursor
 
     if (HasParam(wxT("exstyle")))
-        wnd->SetExtraStyle(GetStyle(wxT("exstyle")));
+        // Have to OR it with existing style, since
+        // some implementations (e.g. wxGTK) use the extra style
+        // during creation
+        wnd->SetExtraStyle(wnd->GetExtraStyle() | GetStyle(wxT("exstyle")));
     if (HasParam(wxT("bg")))
         wnd->SetBackgroundColour(GetColour(wxT("bg")));
     if (HasParam(wxT("fg")))
diff --git a/src/xrc/xmlres.cpp b/src/xrc/xmlres.cpp
index b7c0bc870e..4d6b486ad6 100644
--- a/src/xrc/xmlres.cpp
+++ b/src/xrc/xmlres.cpp
@@ -1127,7 +1127,10 @@ void wxXmlResourceHandler::SetupWindow(wxWindow *wnd)
     //FIXME : add cursor
 
     if (HasParam(wxT("exstyle")))
-        wnd->SetExtraStyle(GetStyle(wxT("exstyle")));
+        // Have to OR it with existing style, since
+        // some implementations (e.g. wxGTK) use the extra style
+        // during creation
+        wnd->SetExtraStyle(wnd->GetExtraStyle() | GetStyle(wxT("exstyle")));
     if (HasParam(wxT("bg")))
         wnd->SetBackgroundColour(GetColour(wxT("bg")));
     if (HasParam(wxT("fg")))