diff --git a/src/or/router.c b/src/or/router.c
index 49a986d64a..0beb960f6d 100644
--- a/src/or/router.c
+++ b/src/or/router.c
@@ -85,7 +85,6 @@ set_onion_key(crypto_pk_env_t *k)
   tor_mutex_acquire(key_lock);
   crypto_free_pk_env(onionkey);
   onionkey = k;
-  onionkey_set_at = time(NULL);
   tor_mutex_release(key_lock);
   mark_my_descriptor_dirty("set onion key");
 }