diff --git a/modules/fediverse/ap_actor.py b/modules/fediverse/ap_actor.py
index cc9286b8..f4095721 100644
--- a/modules/fediverse/ap_actor.py
+++ b/modules/fediverse/ap_actor.py
@@ -1,6 +1,6 @@
 import email.utils, urllib.parse
 from src import utils
-from . import ap_utils
+from . import ap_security, ap_utils
 
 class Actor(object):
     def __init__(self, url):
@@ -48,7 +48,7 @@ class Inbox(object):
         ]
         sign_headers = headers[:]
         sign_headers.insert(0, ["(request-target)", "post %s" % parts.path])
-        signature = security.signature(private_key.key, sign_headers)
+        signature = ap_security.signature(private_key.key, sign_headers)
 
         return ap_utils.request(self._url, activity.format(self),
             method="POST", private_key=private_key)