1 files changed, 1 insertions, 1 deletions

diff --git a/src/lib_os.c b/src/lib_os.c
index 08f538bd..9bfc418b 100644
--- a/src/lib_os.c
+++ b/src/lib_os.c
@@ -205,7 +205,7 @@ LJLIB_CF(os_date)
     const char *q;
     for (q = s; *q; q++)
       sz += (*q == '%') ? 30 : 1;  /* Overflow doesn't matter. */
-    setmref(sb->L, L);
+    setsbufL(sb, L);
     for (;;) {
       char *buf = lj_buf_need(sb, sz);
       size_t len = strftime(buf, sbufsz(sb), s, stm);