diff --git a/src/lj_opt_fold.c b/src/lj_opt_fold.c
index 20b88e25..9c751d98 100644
--- a/src/lj_opt_fold.c
+++ b/src/lj_opt_fold.c
@@ -628,7 +628,7 @@ LJFOLDF(bufput_kfold_op)
     SBuf *sb = &J2G(J)->tmpbuf;
     setsbufL(sb, J->L);
     lj_buf_reset(sb);
-    sb = ((SBuf * LJ_FASTCALL (*)(SBuf *, GCstr *))ci->func)(sb,
+    sb = ((SBuf * (LJ_FASTCALL *)(SBuf *, GCstr *))ci->func)(sb,
 						       ir_kstr(IR(fleft->op2)));
     fins->op2 = lj_ir_kstr(J, lj_buf_tostr(sb));
     fins->op1 = fleft->op1;
diff --git a/src/vm_x86.dasc b/src/vm_x86.dasc
index 8bbeaa2b..68e23847 100644
--- a/src/vm_x86.dasc
+++ b/src/vm_x86.dasc
@@ -2387,9 +2387,9 @@ static void build_subroutines(BuildCtx *ctx)
   |   mov SBUF:FCARG1->L, L:RB
   |   mov SBUF:FCARG1->p, RC
   |  mov SAVE_PC, PC
-  |  call extern lj_buf_putstr_ .. name
+  |  call extern lj_buf_putstr_ .. name .. @8
   |  mov FCARG1, eax
-  |  call extern lj_buf_tostr
+  |  call extern lj_buf_tostr@4
   |  jmp ->fff_resstr
   |.endmacro
   |