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-rw-r--r--perlvars.h4
1 files changed, 3 insertions, 1 deletions
diff --git a/perlvars.h b/perlvars.h
index d3275835dc..ac97ebcd99 100644
--- a/perlvars.h
+++ b/perlvars.h
@@ -99,8 +99,10 @@ PERLVARI(G, mmap_page_size, IV, 0)
#if defined(USE_ITHREADS)
PERLVAR(G, hints_mutex, perl_mutex) /* Mutex for refcounted he refcounting */
-#ifndef USE_THREAD_SAFE_LOCALE
+# if ! defined(USE_THREAD_SAFE_LOCALE) || defined(TS_W32_BROKEN_LOCALECONV)
PERLVAR(G, locale_mutex, perl_mutex) /* Mutex for setlocale() changing */
+# endif
+# ifndef USE_THREAD_SAFE_LOCALE
PERLVAR(G, lc_numeric_mutex, perl_mutex) /* Mutex for switching LC_NUMERIC */
# endif
#endif