1 files changed, 0 insertions, 2 deletions
diff --git a/eval_intern.h b/eval_intern.h
index e503d15d9d..df2d857340 100644
--- a/eval_intern.h
+++ b/eval_intern.h
@@ -291,8 +291,6 @@ CREF_OMOD_SHARED_UNSET(rb_cref_t *cref)
     cref->flags &= ~NODE_FL_CREF_OMOD_SHARED_;
 }
 
-void rb_frame_visibility_set(rb_method_visibility_t);
-
 void rb_thread_cleanup(void);
 void rb_thread_wait_other_threads(void);