diff -up perl-5.38.0/locale.c.orig perl-5.38.0/locale.c
--- perl-5.38.0/locale.c.orig	2023-09-25 13:41:37.090493602 +0200
+++ perl-5.38.0/locale.c	2023-09-25 13:42:07.636750287 +0200
@@ -5280,11 +5280,6 @@ Perl_init_i18nl10n(pTHX_ int printwarn)
     DEBUG_Lv(PerlIO_printf(Perl_debug_log, "created C object %p\n",
                            PL_C_locale_obj));
 
-    /* Switch to using the POSIX 2008 interface now.  This would happen below
-     * anyway, but deferring it can lead to leaks of memory that would also get
-     * malloc'd in the interim */
-    uselocale(PL_C_locale_obj);
-
 #    ifdef USE_LOCALE_NUMERIC
 
     PL_underlying_numeric_obj = duplocale(PL_C_locale_obj);