diff --git a/cfg/wxwidgets.cfg b/cfg/wxwidgets.cfg
index dd051e38b..5fdeff9c0 100644
--- a/cfg/wxwidgets.cfg
+++ b/cfg/wxwidgets.cfg
@@ -2173,6 +2173,7 @@
   <define name="wxRETAINED" value="0x00000000"/>
   <define name="wxBACKINGSTORE" value="0x00000000"/>
   <define name="wxPOPUP_WINDOW" value="0x00020000"/>
+  <define name="wxWINDOW_STYLE_MASK" value="0xFFFF0000"/>
   <define name="wxFULL_REPAINT_ON_RESIZE" value="0x00010000"/>
   <define name="wxNO_FULL_REPAINT_ON_RESIZE" value="0"/>
   <define name="wxWS_EX_BLOCK_EVENTS" value="0x00000002"/>