diff --git a/cfg/windows.cfg b/cfg/windows.cfg
index 66601f3cb..1cc5937f6 100644
--- a/cfg/windows.cfg
+++ b/cfg/windows.cfg
@@ -3322,7 +3322,7 @@ HFONT CreateFont(
   </function>
   <!-- size_t _mbslen_l( const unsigned char *str, _locale_t locale);  -->
   <!-- size_t _mbstrlen_l( const char *str, _locale_t locale ); -->
-  <function name="_mbslen_l,_mbstrlen_l">
+  <function name="_mbslen_l,_mbstrlen_l,_tcsclen_l">
     <use-retval/>
     <pure/>
     <noreturn>false</noreturn>