diff --git a/cfg/wxwidgets.cfg b/cfg/wxwidgets.cfg
index c1372b52d..7bfb176c5 100644
--- a/cfg/wxwidgets.cfg
+++ b/cfg/wxwidgets.cfg
@@ -9153,4 +9153,12 @@
       <not-null/>
     </arg>
   </function>
+  <!-- static wxString wxFileSystem::FileNameToURL( const wxFileName & filename ) -->
+  <function name="wxFileSystem::FileNameToURL">
+    <noreturn>false</noreturn>
+    <returnValue type="wxString"/>
+    <pure/>
+    <use-retval/>
+    <arg nr="1" direction="in"/>
+  </function>
 </def>