1 files changed, 1 insertions, 0 deletions

diff --git a/src/lj_ir.h b/src/lj_ir.h
index aacef2b4..f953ff0e 100644
--- a/src/lj_ir.h
+++ b/src/lj_ir.h
@@ -204,6 +204,7 @@ IRFPMDEF(FPMENUM)
   _(UDATA_META, offsetof(GCudata, metatable)) \
   _(UDATA_UDTYPE, offsetof(GCudata, udtype)) \
   _(UDATA_FILE, sizeof(GCudata)) \
+  _(UDATA_BUF_R, sizeof(GCudata) + offsetof(SBufExt, r)) \
   _(CDATA_CTYPEID, offsetof(GCcdata, ctypeid)) \
   _(CDATA_PTR,  sizeof(GCcdata)) \
   _(CDATA_INT, sizeof(GCcdata)) \