1 files changed, 1 insertions, 1 deletions
diff --git a/vm_args.c b/vm_args.c
index bea38078ec..e1269bbc5f 100644
--- a/vm_args.c
+++ b/vm_args.c
@@ -875,7 +875,7 @@ refine_sym_proc_call(RB_BLOCK_CALL_FUNC_ARGLIST(yielded_arg, callback_arg))
 
 static VALUE
 vm_caller_setup_arg_block(const rb_execution_context_t *ec, rb_control_frame_t *reg_cfp,
-                          const struct rb_call_info *ci, rb_iseq_t *blockiseq, const int is_super)
+                          const struct rb_call_info *ci, const rb_iseq_t *blockiseq, const int is_super)
 {
     if (ci->flag & VM_CALL_ARGS_BLOCKARG) {
 	VALUE block_code = *(--reg_cfp->sp);