--- rxvt-unicode-9.31/src/rxvtperl.xs.old	2023-07-10 12:34:05.330394045 +0200
+++ rxvt-unicode-9.31/src/rxvtperl.xs	2023-07-10 12:33:53.979406422 +0200
@@ -399,7 +399,7 @@
 {
   if (!perl)
     {
-      rxvt_push_locale (""); // perl init destroys current locale
+      rxvt_push_locale ("C"); // perl init destroys current locale
 
       {
         perl_environ = rxvt_environ;