diff --git a/cfg/wxwidgets.cfg b/cfg/wxwidgets.cfg
index 9b7da19dd..3254d67f7 100644
--- a/cfg/wxwidgets.cfg
+++ b/cfg/wxwidgets.cfg
@@ -11748,6 +11748,34 @@
     <arg nr="2" default="false" direction="in">
       <not-uninit/>
     </arg>
+  </function>
+    <!-- void wxSplitterWindow::SetSashGravity( double gravity ) -->
+  <function name="wxSplitterWindow::SetSashGravity">
+    <noreturn>false</noreturn>
+    <returnValue type="void"/>
+    <leak-ignore/>
+    <arg nr="1" direction="in">
+      <not-uninit/>
+      <valid>0.0:1.0</valid>
+    </arg>
+  </function>
+  <!-- virtual bool wxSplitterWindow::SplitHorizontally(wxWindow * window1, wxWindow * window2, int sashPosition = 0) -->
+  <!-- virtual bool wxSplitterWindow::SplitVertically(wxWindow * window1, wxWindow * window2, int sashPosition = 0) -->
+  <function name="wxSplitterWindow::SplitHorizontally,wxSplitterWindow::SplitVertically">
+    <noreturn>false</noreturn>
+    <returnValue type="bool"/>
+    <leak-ignore/>
+    <arg nr="1" direction="in">
+      <not-uninit/>
+      <not-null/>
+    </arg>
+    <arg nr="2" direction="in">
+      <not-uninit/>
+      <not-null/>
+    </arg>
+    <arg nr="3" default="0" direction="in">
+      <not-uninit/>
+    </arg>
   </function>
   <!-- wxVariant wxPropertyGridInterface::GetPropertyValue( wxPGPropArg id ) -->
   <!-- wxVariant wxPropertyGridManager::GetPropertyValue( wxPGPropArg id ) -->