1 files changed, 3 insertions, 2 deletions

diff --git a/src/lj_bcwrite.c b/src/lj_bcwrite.c
index a0230eff5..fb557e588 100644
--- a/src/lj_bcwrite.c
+++ b/src/lj_bcwrite.c
@@ -340,7 +340,7 @@ static void bcwrite_proto(BCWriteCtx *ctx, GCproto *pt)
   p += 5;  /* Leave room for final size. */
 
   /* Write prototype header. */
-  *p++ = (pt->flags & (PROTO_CHILD|PROTO_VARARG|PROTO_FFI));
+  *p++ = (pt->flags & (PROTO_CHILD|PROTO_VARARG|PROTO_FFI|PROTO_BITOP));
   *p++ = pt->numparams;
   *p++ = pt->framesize;
   *p++ = pt->sizeuv;
@@ -397,7 +397,8 @@ static void bcwrite_header(BCWriteCtx *ctx)
   *p++ = BCDUMP_VERSION;
   *p++ = (ctx->flags & (BCDUMP_F_STRIP | BCDUMP_F_FR2)) +
          LJ_BE*BCDUMP_F_BE +
-         ((ctx->pt->flags & PROTO_FFI) ? BCDUMP_F_FFI : 0);
+         ((ctx->pt->flags & PROTO_FFI) ? BCDUMP_F_FFI : 0) +
+         ((ctx->pt->flags & PROTO_BITOP) ? BCDUMP_F_BITOP : 0);
   if (!(ctx->flags & BCDUMP_F_STRIP)) {
     p = lj_strfmt_wuleb128(p, len);
     p = lj_buf_wmem(p, name, len);