diff --git a/lib/libc/locale/collate.c b/lib/libc/locale/collate.c
index c992d2299ab..7afb2043e6a 100644
--- a/lib/libc/locale/collate.c
+++ b/lib/libc/locale/collate.c
@@ -131,7 +131,7 @@ __collate_load_tables_l(const char *encoding, struct xlocale_collate *table)
 	if (asprintf(&buf, "%s/%s/LC_COLLATE", _PathLocale, encoding) == -1)
 		return (_LDP_ERROR);
 
-	if ((fd = _open(buf, O_RDONLY)) < 0) {
+	if ((fd = _open(buf, O_RDONLY | O_CLOEXEC)) < 0) {
 		free(buf);
 		return (_LDP_ERROR);
 	}
diff --git a/lib/libc/locale/rune.c b/lib/libc/locale/rune.c
index b7334636f65..ce2095763eb 100644
--- a/lib/libc/locale/rune.c
+++ b/lib/libc/locale/rune.c
@@ -74,7 +74,7 @@ _Read_RuneMagi(const char *fname)
 	int runetype_ext_len = 0;
 	int fd;
 
-	if ((fd = _open(fname, O_RDONLY)) < 0) {
+	if ((fd = _open(fname, O_RDONLY | O_CLOEXEC)) < 0) {
 		errno = EINVAL;
 		return (NULL);
 	}