1 files changed, 1 insertions, 0 deletions
diff --git a/src/data.c b/src/data.c
index b9f440c93aa..4537e649b7f 100644
--- a/src/data.c
+++ b/src/data.c
@@ -2757,6 +2757,7 @@ syms_of_data ()
   defsubr (&Snatnump);
   defsubr (&Ssymbolp);
   defsubr (&Sstringp);
+  defsubr (&Smultibyte_string_p);
   defsubr (&Svectorp);
   defsubr (&Schar_table_p);
   defsubr (&Svector_or_char_table_p);