1 files changed, 10 insertions, 1 deletions

diff --git a/src/lj_ffrecord.c b/src/lj_ffrecord.c
index 844fc497..d050d12d 100644
--- a/src/lj_ffrecord.c
+++ b/src/lj_ffrecord.c
@@ -961,8 +961,17 @@ static void LJ_FASTCALL recff_string_format(jit_State *J, RecordFFData *rd)
     case STRFMT_INT:
       id = IRCALL_lj_strfmt_putfnum_int;
     handle_int:
-      if (!tref_isinteger(tra))
+      if (!tref_isinteger(tra)) {
+#if LJ_HASFFI
+        if (tref_iscdata(tra)) {
+          tra = lj_crecord_loadiu64(J, tra, &rd->argv[arg-1]);
+          tr = lj_ir_call(J, IRCALL_lj_strfmt_putfxint, tr, trsf, tra);
+          lj_needsplit(J);
+          break;
+        }
+#endif
         goto handle_num;
+      }
       if (sf == STRFMT_INT) { /* Shortcut for plain %d. */
         tr = emitir(IRTG(IR_BUFPUT, IRT_PGC), tr,
                     emitir(IRT(IR_TOSTR, IRT_STR), tra, IRTOSTR_INT));