diff --git a/cfg/wxwidgets.cfg b/cfg/wxwidgets.cfg
index 36ce0024e..306ccda06 100644
--- a/cfg/wxwidgets.cfg
+++ b/cfg/wxwidgets.cfg
@@ -11759,6 +11759,18 @@
       <valid>0.0:1.0</valid>
     </arg>
   </function>
+  <!-- void wxSplitterWindow::SetSashPosition( int position, bool redraw = true ) -->
+  <function name="wxSplitterWindow::SetSashPosition">
+    <noreturn>false</noreturn>
+    <returnValue type="void"/>
+    <leak-ignore/>
+    <arg nr="1" direction="in">
+      <not-uninit/>
+    </arg>
+    <arg nr="2" default="true" direction="in">
+      <not-uninit/>
+    </arg>
+  </function>
   <!--void wxSplitterWindow::SetMinimumPaneSize( int min ) -->
   <function name="wxSplitterWindow::SetMinimumPaneSize">
     <noreturn>false</noreturn>