1 files changed, 1 insertions, 1 deletions
diff --git a/src/vm.c b/src/vm.c
index 238d32dae..28eeaac7a 100644
--- a/src/vm.c
+++ b/src/vm.c
@@ -1754,7 +1754,7 @@ RETRY_TRY_BLOCK:
       }
       else if (len > 1 && argc == 1 && mrb_array_p(argv[0])) {
         mrb_gc_protect(mrb, argv[0]);
-        argc = RARRAY_LEN(argv[0]);
+        argc = (int)RARRAY_LEN(argv[0]);
         argv = RARRAY_PTR(argv[0]);
       }
       if (argc < len) {