diff --git a/ext/POSIX/POSIX.xs b/ext/POSIX/POSIX.xs
index 0fab00952593..a3b0fffbe0e0 100644
--- a/ext/POSIX/POSIX.xs
+++ b/ext/POSIX/POSIX.xs
@@ -2138,7 +2138,7 @@ localeconv()
 #else
 	struct lconv *lcbuf;
 #  if defined(USE_ITHREADS)                                             \
-   && defined(HAS_POSIX_2008_LOCALE)                                    \
+   && defined(USE_POSIX_2008_LOCALE)                                    \
    && defined(HAS_LOCALECONV_L) /* Prefer this thread-safe version */
         bool do_free = FALSE;
         locale_t cur = NULL;
@@ -2166,7 +2166,7 @@ localeconv()
 	RETVAL = newHV();
 	sv_2mortal((SV*)RETVAL);
 #  if defined(USE_ITHREADS)                         \
-   && defined(HAS_POSIX_2008_LOCALE)                \
+   && defined(USE_POSIX_2008_LOCALE)                \
    && defined(HAS_LOCALECONV_L)
 
         cur = uselocale((locale_t) 0);
@@ -2247,7 +2247,7 @@ localeconv()
             }
 	}
 #  if defined(USE_ITHREADS)                         \
-   && defined(HAS_POSIX_2008_LOCALE)                \
+   && defined(USE_POSIX_2008_LOCALE)                \
    && defined(HAS_LOCALECONV_L)
         if (do_free) {
             freelocale(cur);
diff --git a/ext/POSIX/lib/POSIX.pm b/ext/POSIX/lib/POSIX.pm
index 08986d26577d..8305c3014a60 100644
--- a/ext/POSIX/lib/POSIX.pm
+++ b/ext/POSIX/lib/POSIX.pm
@@ -4,7 +4,7 @@ use warnings;
 
 our ($AUTOLOAD, %SIGRT);
 
-our $VERSION = '1.97';
+our $VERSION = '1.98';
 
 require XSLoader;
 
diff --git a/intrpvar.h b/intrpvar.h
index 5c49d31528a3..88162843cab6 100644
--- a/intrpvar.h
+++ b/intrpvar.h
@@ -805,7 +805,7 @@ PERLVARI(I, numeric_standard, int, TRUE)
 PERLVAR(I, numeric_name, char *)	/* Name of current numeric locale */
 PERLVAR(I, numeric_radix_sv, SV *)	/* The radix separator if not '.' */
 
-#  ifdef HAS_POSIX_2008_LOCALE
+#  ifdef USE_POSIX_2008_LOCALE
 
 PERLVARI(I, underlying_numeric_obj, locale_t, NULL)
 
diff --git a/locale.c b/locale.c
index e8c9dc3a9f6e..65d2a26272af 100644
--- a/locale.c
+++ b/locale.c
@@ -1166,7 +1166,7 @@ S_new_numeric(pTHX_ const char *newnum)
 
     PL_numeric_underlying_is_standard = PL_numeric_standard;
 
-#  ifdef HAS_POSIX_2008_LOCALE
+#  ifdef USE_POSIX_2008_LOCALE
 
     PL_underlying_numeric_obj = newlocale(LC_NUMERIC_MASK,
                                           PL_numeric_name,
@@ -2290,7 +2290,7 @@ S_my_nl_langinfo(const int item, bool toggle)
 
 #if defined(HAS_NL_LANGINFO) /* nl_langinfo() is available.  */
 #  if   ! defined(HAS_THREAD_SAFE_NL_LANGINFO_L)      \
-     || ! defined(HAS_POSIX_2008_LOCALE)
+     || ! defined(USE_POSIX_2008_LOCALE)
 
     /* Here, use plain nl_langinfo(), switching to the underlying LC_NUMERIC
      * for those items dependent on it.  This must be copied to a buffer before
@@ -5359,13 +5359,11 @@ Perl_thread_locale_term()
 {
     /* Called from a thread as it gets ready to terminate */
 
-#ifdef USE_THREAD_SAFE_LOCALE
+#ifdef USE_POSIX_2008_LOCALE
 
     /* C starts the new thread in the global C locale.  If we are thread-safe,
      * we want to not be in the global locale */
 
-#  ifndef WIN32
-
     {   /* Free up */
         locale_t cur_obj = uselocale(LC_GLOBAL_LOCALE);
         if (cur_obj != LC_GLOBAL_LOCALE && cur_obj != PL_C_locale_obj) {
@@ -5373,7 +5371,6 @@ Perl_thread_locale_term()
         }
     }
 
-#  endif
 #endif
 
 }
diff --git a/makedef.pl b/makedef.pl
index 75167c20ab11..72c48f7d90c1 100644
--- a/makedef.pl
+++ b/makedef.pl
@@ -415,16 +415,6 @@ sub readvar {
     ++$skip{$_} foreach qw(
         PL_C_locale_obj
         PL_curlocales
-    );
-}
-
-unless ( $define{'HAS_NEWLOCALE'}
-    &&   $define{'HAS_FREELOCALE'}
-    &&   $define{'HAS_USELOCALE'}
-    && ! $define{'NO_POSIX_2008_LOCALE'})
-{
-    ++$skip{$_} foreach qw(
-        PL_C_locale_obj
         PL_underlying_numeric_obj
     );
 }
diff --git a/perl.c b/perl.c
index 56f1268e41bd..240e144c053d 100644
--- a/perl.c
+++ b/perl.c
@@ -1117,7 +1117,7 @@ perl_destruct(pTHXx)
         PL_curlocales[i] = NULL;
     }
 #endif
-#ifdef HAS_POSIX_2008_LOCALE
+#ifdef USE_POSIX_2008_LOCALE
     {
         /* This also makes sure we aren't using a locale object that gets freed
          * below */
diff --git a/perl.h b/perl.h
index 526321833d0d..276a15cd73fc 100644
--- a/perl.h
+++ b/perl.h
@@ -6711,14 +6711,14 @@ the plain locale pragma without a parameter (S<C<use locale>>) is in effect.
     * separate mutexes for some of them, the only changes needed are here.
     * Define just the necessary macros.  The compiler should then croak if the
     * #ifdef's in the code are incorrect */
-#  if defined(HAS_LOCALECONV) && (  ! defined(HAS_POSIX_2008_LOCALE)        \
+#  if defined(HAS_LOCALECONV) && (  ! defined(USE_POSIX_2008_LOCALE)        \
                                  || ! defined(HAS_LOCALECONV_L)             \
                                  ||   defined(TS_W32_BROKEN_LOCALECONV))
 #    define LOCALECONV_LOCK   LOCALE_LOCK_
 #    define LOCALECONV_UNLOCK LOCALE_UNLOCK_
 #  endif
 #  if defined(HAS_NL_LANGINFO) && (   ! defined(HAS_THREAD_SAFE_NL_LANGINFO_L) \
-                                   || ! defined(HAS_POSIX_2008_LOCALE))
+                                   || ! defined(USE_POSIX_2008_LOCALE))
 #    define NL_LANGINFO_LOCK   LOCALE_LOCK_
 #    define NL_LANGINFO_UNLOCK LOCALE_UNLOCK_
 #  endif
diff --git a/sv.c b/sv.c
index e8373953954b..0adbb5d671b7 100644
--- a/sv.c
+++ b/sv.c
@@ -15663,7 +15663,7 @@ perl_clone_using(PerlInterpreter *proto_perl, UV flags,
     PL_numeric_name	= SAVEPV(proto_perl->Inumeric_name);
     PL_numeric_radix_sv	= sv_dup_inc(proto_perl->Inumeric_radix_sv, param);
 
-#  if defined(HAS_POSIX_2008_LOCALE)
+#  if defined(USE_POSIX_2008_LOCALE)
     PL_underlying_numeric_obj = NULL;
 #  endif
 #endif /* !USE_LOCALE_NUMERIC */