1 files changed, 1 insertions, 1 deletions

diff --git a/src/lj_ccallback.c b/src/lj_ccallback.c
index b234ec67..bef379a5 100644
--- a/src/lj_ccallback.c
+++ b/src/lj_ccallback.c
@@ -432,7 +432,7 @@ static void callback_conv_args(CTState *cts, lua_State *L)
   o->u32.hi = rid;  /* Return type. x86: +(spadj<<16). */
   o++;
   setframe_gc(o, obj2gco(fn));
-  setframe_ftsz(o, (int)((char *)(o+1) - (char *)L->base) + FRAME_CONT);
+  setframe_ftsz(o, ((char *)(o+1) - (char *)L->base) + FRAME_CONT);
   L->top = L->base = ++o;
   if (!ct)
     lj_err_caller(cts->L, LJ_ERR_FFI_BADCBACK);