1 files changed, 1 insertions, 0 deletions

diff --git a/src/lj_obj.h b/src/lj_obj.h
index f40ef706..f49b12f9 100644
--- a/src/lj_obj.h
+++ b/src/lj_obj.h
@@ -247,6 +247,7 @@ typedef struct GCudata {
 enum {
   UDTYPE_USERDATA,      /* Regular userdata. */
   UDTYPE_IO_FILE,       /* I/O library FILE. */
+  UDTYPE_FFI_CLIB,      /* FFI C library namespace. */
   UDTYPE__MAX
 };