diff --git a/src/allmydata/immutable/upload.py b/src/allmydata/immutable/upload.py
index 18f818504..171b71eff 100644
--- a/src/allmydata/immutable/upload.py
+++ b/src/allmydata/immutable/upload.py
@@ -385,6 +385,12 @@ class PeerSelector(object):
         )
         return self.happiness_mappings
 
+    def add_peers(self, peerids=None):
+        raise NotImplementedError
+
+    def confirm_share_allocation(self, peerid, shnum):
+        raise NotImplementedError
+
 
 class _QueryStatistics(object):