diff --git a/cfg/wxwidgets.cfg b/cfg/wxwidgets.cfg
index aa3254f9a..d8ba4b0bb 100644
--- a/cfg/wxwidgets.cfg
+++ b/cfg/wxwidgets.cfg
@@ -8123,7 +8123,7 @@
   <function name="wxStrlen">
     <noreturn>false</noreturn>
     <leak-ignore/>
-    <returnValue type="size_t"/>
+    <returnValue type="size_t">strlen(arg1)</returnValue>
     <use-retval/>
     <arg nr="1" direction="in"/>
   </function>