diff --git a/avatar/templatetags/avatar_tags.py b/avatar/templatetags/avatar_tags.py
index 6e2c6a5..9f3aac7 100644
--- a/avatar/templatetags/avatar_tags.py
+++ b/avatar/templatetags/avatar_tags.py
@@ -31,8 +31,9 @@ def avatar_url(user, size=settings.AVATAR_DEFAULT_SIZE):
         params = {'s': str(size)}
         if settings.AVATAR_GRAVATAR_DEFAULT:
             params['d'] = settings.AVATAR_GRAVATAR_DEFAULT
-        path = "%s/?%s" % (hashlib.md5(force_bytes(
-            getattr(settings.GRAVATAR_FIELD))).hexdigest(), urlencode(params))
+        path = "%s/?%s" % (hashlib.md5(
+            force_bytes(getattr(settings.AVATAR_GRAVATAR_FIELD))).hexdigest(),
+            urlencode(params))
         return urljoin(settings.AVATAR_GRAVATAR_BASE_URL, path)
 
     return get_default_avatar_url()