diff --git a/cfg/wxwidgets.cfg b/cfg/wxwidgets.cfg
index 1c28f6676..b131a0447 100644
--- a/cfg/wxwidgets.cfg
+++ b/cfg/wxwidgets.cfg
@@ -1774,6 +1774,17 @@
     <returnValue type="size_t"/>
     <use-retval/>
   </function>
+  <!--wxPGProperty* wxPropertyGridInterface::Append(wxPGProperty * property)-->
+  <!--wxPGProperty* wxPropertyGridPage::Append(wxPGProperty * property)-->
+  <function name="wxPropertyGridInterface::Append,wxPropertyGridPage::Append">
+    <noreturn>false</noreturn>
+    <leak-ignore/>
+    <returnValue type="wxPGProperty*"/>
+    <arg nr="2">
+      <not-uninit/>
+      <not-null/>
+    </arg>
+  </function>
   <define name="wxOVERRIDE" value="override"/>
   <define name="wxEXPLICIT" value="explicit"/>
   <define name="WXSIZEOF(array)" value="(sizeof(array)/sizeof(array[0]))"/>