diff --git a/apps/openmw/mwgui/birth.cpp b/apps/openmw/mwgui/birth.cpp
index 608d2a9e6..84814d778 100644
--- a/apps/openmw/mwgui/birth.cpp
+++ b/apps/openmw/mwgui/birth.cpp
@@ -12,15 +12,10 @@ using namespace MWGui;
 using namespace Widgets;
 
 BirthDialog::BirthDialog(MWWorld::Environment& environment)
-  : Layout("openmw_chargen_birth_layout.xml")
-  , environment(environment)
+  : WindowBase("openmw_chargen_birth_layout.xml", environment)
 {
     // Centre dialog
-    MyGUI::IntSize gameWindowSize = environment.mWindowManager->getGui()->getViewSize();
-    MyGUI::IntCoord coord = mMainWidget->getCoord();
-    coord.left = (gameWindowSize.width - coord.width)/2;
-    coord.top = (gameWindowSize.height - coord.height)/2;
-    mMainWidget->setCoord(coord);
+    center();
 
     getWidget(spellArea, "SpellArea");
 
diff --git a/apps/openmw/mwgui/birth.hpp b/apps/openmw/mwgui/birth.hpp
index 192a03e48..5a8d11b7e 100644
--- a/apps/openmw/mwgui/birth.hpp
+++ b/apps/openmw/mwgui/birth.hpp
@@ -1,7 +1,7 @@
 #ifndef MWGUI_BIRTH_H
 #define MWGUI_BIRTH_H
 
-#include <openengine/gui/layout.hpp>
+#include "window_base.hpp"
 
 namespace MWWorld
 {
@@ -17,7 +17,7 @@ namespace MWGui
 {
     using namespace MyGUI;
 
-    class BirthDialog : public OEngine::GUI::Layout
+    class BirthDialog : public WindowBase
     {
     public:
         BirthDialog(MWWorld::Environment& environment);
@@ -57,8 +57,6 @@ namespace MWGui
         void updateBirths();
         void updateSpells();
 
-        MWWorld::Environment& environment;
-
         MyGUI::ListPtr    birthList;
         MyGUI::WidgetPtr  spellArea;
         MyGUI::StaticImagePtr birthImage;