1 files changed, 1 insertions, 1 deletions
diff --git a/src/kernel.c b/src/kernel.c
index e687c9db7..9dc085a94 100644
--- a/src/kernel.c
+++ b/src/kernel.c
@@ -600,7 +600,7 @@ obj_is_instance_of(mrb_state *mrb, mrb_value self)
 static void
 check_iv_name(mrb_state *mrb, mrb_sym id)
 {
-  char *s;
+  const char *s;
   int len;
 
   s = mrb_sym2name_len(mrb, id, &len);