diff --git a/cfg/wxwidgets.cfg b/cfg/wxwidgets.cfg
index cefcb5cf914..006c8f7f297 100644
--- a/cfg/wxwidgets.cfg
+++ b/cfg/wxwidgets.cfg
@@ -5411,20 +5411,22 @@
     </arg>
   </function>
   <!-- http://docs.wxwidgets.org/trunk/classwx_string.html#ace32756bab999f8aae9be0cf981fc449 -->
-  <!-- bool wxString::IsEmpty() -->
+  <!-- bool wxString::IsEmpty() const -->
   <function name="wxString::IsEmpty">
     <noreturn>false</noreturn>
     <leak-ignore/>
     <returnValue type="bool"/>
     <use-retval/>
+    <const/>
   </function>
   <!-- http://docs.wxwidgets.org/trunk/classwx_string.html#ae0a2020695a6ecd9ee49c14fe7429176 -->
-  <!-- bool wxString::IsNull() -->
+  <!-- bool wxString::IsNull() const -->
   <function name="wxString::IsNull">
     <noreturn>false</noreturn>
     <leak-ignore/>
     <returnValue type="bool"/>
     <use-retval/>
+    <const/>
     <warn severity="style">This is the same as 'wxString::IsEmpty' and is kept for wxWidgets 1.xx compatibility. You should not use it in new code.</warn>
   </function>
   <!-- bool wxString::Contains(const wxString & str) const-->