1 files changed, 1 insertions, 1 deletions
diff --git a/src/symbol.c b/src/symbol.c
index ebb269206..f08287d93 100644
--- a/src/symbol.c
+++ b/src/symbol.c
@@ -73,7 +73,7 @@ typedef struct symbol_name {
 static void
 sym_validate_len(mrb_state *mrb, size_t len)
 {
-  if (len >= RITE_LV_NULL_MARK) {
+  if (len >= UINT16_MAX) {
     mrb_raise(mrb, E_ARGUMENT_ERROR, "symbol length too long");
   }
 }