1 files changed, 1 insertions, 1 deletions
diff --git a/vm_core.h b/vm_core.h
index fe7bcacfa..40b993347 100644
--- a/vm_core.h
+++ b/vm_core.h
@@ -588,7 +588,7 @@ VALUE rb_vm_make_env_object(rb_thread_t *th, rb_control_frame_t *cfp);
 void *rb_thread_call_with_gvl(void *(*func)(void *), void *data1);
 int ruby_thread_has_gvl_p(void);
 VALUE rb_make_backtrace(void);
-typedef int rb_backtrace_iter_func(void *, const char *, int, const char *);
+typedef int rb_backtrace_iter_func(void *, VALUE, int, VALUE);
 VALUE rb_backtrace_each(rb_backtrace_iter_func *iter, void *arg);
 rb_control_frame_t *rb_vm_get_ruby_level_next_cfp(rb_thread_t *th, rb_control_frame_t *cfp);