1 files changed, 2 insertions, 2 deletions

diff --git a/src/lj_ffrecord.c b/src/lj_ffrecord.c
index 60c1d84f..022de1aa 100644
--- a/src/lj_ffrecord.c
+++ b/src/lj_ffrecord.c
@@ -1117,7 +1117,7 @@ static LJ_AINLINE TRef recff_sbufx_len(jit_State *J, TRef trr, TRef trw)
 }
 
 /* Emit typecheck for string buffer. */
-static TRef recff_sbufx_check(jit_State *J, RecordFFData *rd, int arg)
+static TRef recff_sbufx_check(jit_State *J, RecordFFData *rd, ptrdiff_t arg)
 {
   TRef trtype, ud = J->base[arg];
   if (!tvisbuf(&rd->argv[arg])) lj_trace_err(J, LJ_TRERR_BADTYPE);
@@ -1135,7 +1135,7 @@ static TRef recff_sbufx_write(jit_State *J, TRef ud)
 }
 
 /* Check for integer in range for the buffer API. */
-static TRef recff_sbufx_checkint(jit_State *J, RecordFFData *rd, int arg)
+static TRef recff_sbufx_checkint(jit_State *J, RecordFFData *rd, ptrdiff_t arg)
 {
   TRef tr = J->base[arg];
   TRef trlim = lj_ir_kint(J, LJ_MAX_BUF);