diff --git a/lib/libc/locale/lmonetary.c b/lib/libc/locale/lmonetary.c
--- a/lib/libc/locale/lmonetary.c
+++ b/lib/libc/locale/lmonetary.c
@@ -107,8 +107,6 @@
 		&loc->buffer, "LC_MONETARY",
 		LCMONETARY_SIZE_FULL, LCMONETARY_SIZE_MIN,
 		(const char **)l);
-	if (ret != _LDP_ERROR)
-		*changed = 1;
 	if (ret == _LDP_LOADED) {
 		l->mon_grouping =
 		     __fix_locale_grouping_str(l->mon_grouping);
@@ -146,6 +144,8 @@
 		M_ASSIGN_ICHAR(p_sign_posn);
 		M_ASSIGN_ICHAR(n_sign_posn);
 	}
+	if (ret != _LDP_ERROR)
+		atomic_store_rel_int(changed, 1);
 	return (ret);
 }
 int
diff --git a/lib/libc/locale/lnumeric.c b/lib/libc/locale/lnumeric.c
--- a/lib/libc/locale/lnumeric.c
+++ b/lib/libc/locale/lnumeric.c
@@ -73,8 +73,6 @@
 		&loc->buffer, "LC_NUMERIC",
 		LCNUMERIC_SIZE, LCNUMERIC_SIZE,
 		(const char**)l);
-	if (ret != _LDP_ERROR)
-		*changed= 1;
 	if (ret == _LDP_LOADED) {
 		/* Can't be empty according to C99 */
 		if (*l->decimal_point == '\0')
@@ -83,6 +81,8 @@
 		l->grouping =
 		    __fix_locale_grouping_str(l->grouping);
 	}
+	if (ret != _LDP_ERROR)
+		atomic_store_rel_int(changed, 1);
 	return (ret);
 }
 
diff --git a/lib/libc/locale/localeconv.c b/lib/libc/locale/localeconv.c
--- a/lib/libc/locale/localeconv.c
+++ b/lib/libc/locale/localeconv.c
@@ -65,7 +65,7 @@
 	FIX_LOCALE(loc);
     struct lconv *ret = &loc->lconv;
 
-    if (loc->monetary_locale_changed) {
+    if (atomic_load_acq_int(&loc->monetary_locale_changed) != 0) {
 	/* LC_MONETARY part */
         struct lc_monetary_T * mptr; 
 
@@ -94,10 +94,10 @@
 	M_ASSIGN_CHAR(int_n_sep_by_space);
 	M_ASSIGN_CHAR(int_p_sign_posn);
 	M_ASSIGN_CHAR(int_n_sign_posn);
-	loc->monetary_locale_changed = 0;
+	atomic_store_int(&loc->monetary_locale_changed, 0);
     }
 
-    if (loc->numeric_locale_changed) {
+    if (atomic_load_acq_int(&loc->numeric_locale_changed) != 0) {
 	/* LC_NUMERIC part */
         struct lc_numeric_T * nptr; 
 
@@ -107,7 +107,7 @@
 	N_ASSIGN_STR(decimal_point);
 	N_ASSIGN_STR(thousands_sep);
 	N_ASSIGN_STR(grouping);
-	loc->numeric_locale_changed = 0;
+	atomic_store_int(&loc->numeric_locale_changed, 0);
     }
 
     return ret;