1 files changed, 1 insertions, 1 deletions
diff --git a/src/symbol.c b/src/symbol.c
index de2cc2881..21bf1db7c 100644
--- a/src/symbol.c
+++ b/src/symbol.c
@@ -401,7 +401,7 @@ sym_inspect(mrb_state *mrb, mrb_value sym)
   sp = RSTRING_PTR(str);
   RSTRING_PTR(str)[0] = ':';
   memcpy(sp+1, name, len);
-  mrb_assert(len > 0 && (size_t)len <= SIZE_MAX);
+  mrb_assert_int_fit(mrb_int, len, size_t, SIZE_MAX);
   if (!symname_p(name) || strlen(name) != (size_t)len) {
     str = mrb_str_dump(mrb, str);
     sp = RSTRING_PTR(str);