1 files changed, 0 insertions, 2 deletions
diff --git a/thread.c b/thread.c
index 9301e41696..901667e1b3 100644
--- a/thread.c
+++ b/thread.c
@@ -662,8 +662,6 @@ rb_vm_proc_local_ep(VALUE proc)
     }
 }
 
-extern VALUE rb_adjust_argv_kw_splat(int *argc, const VALUE **argv, int *kw_splat);
-
 static void
 thread_do_start(rb_thread_t *th)
 {