diff --git a/cfg/wxwidgets.cfg b/cfg/wxwidgets.cfg
index 153325d90..182d0d5ef 100644
--- a/cfg/wxwidgets.cfg
+++ b/cfg/wxwidgets.cfg
@@ -6084,6 +6084,16 @@
     <returnValue type="bool"/>
     <arg nr="1"/>
   </function>
+  <!-- wxPGProperty* wxPGProperty::AppendChild(wxPGProperty * childProperty) -->
+  <function name="wxPGProperty::AppendChild">
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <returnValue type="wxPGProperty*"/>
+    <arg nr="1">
+      <not-uninit/>
+      <not-null/>
+    </arg>
+  </function>
   <!-- bool wxPGProperty::SetValueFromString(const wxString & text, int flags = wxPG_PROGRAMMATIC_VALUE) -->
   <function name="wxPGProperty::SetValueFromString">
     <noreturn>false</noreturn>