diff --git a/synapse/rest/client/v1/push_rule.py b/synapse/rest/client/v1/push_rule.py
index c135353aab..02d837ee6a 100644
--- a/synapse/rest/client/v1/push_rule.py
+++ b/synapse/rest/client/v1/push_rule.py
@@ -132,9 +132,6 @@ class PushRuleRestServlet(ClientV1RestServlet):
 
         enabled_map = yield self.store.get_push_rules_enabled_for_user(user_id)
 
-        rawrules = {k: v for k, v in rawrules.item() if k is not None}
-        enabled_map = {k: v for k, v in enabled_map.item() if k is not None}
-
         rules = format_push_rules_for_user(requester.user, rawrules, enabled_map)
 
         path = request.postpath[1:]
diff --git a/synapse/storage/push_rule.py b/synapse/storage/push_rule.py
index f285f59afd..65c20e8900 100644
--- a/synapse/storage/push_rule.py
+++ b/synapse/storage/push_rule.py
@@ -66,7 +66,10 @@ class PushRuleStore(SQLBaseStore):
         if not user_ids:
             defer.returnValue({})
 
-        results = {}
+        results = {
+            user_id: []
+            for user_id in user_ids
+        }
 
         rows = yield self._simple_select_many_batch(
             table="push_rules",
@@ -90,7 +93,10 @@ class PushRuleStore(SQLBaseStore):
         if not user_ids:
             defer.returnValue({})
 
-        results = {}
+        results = {
+            user_id: []
+            for user_id in user_ids
+        }
 
         rows = yield self._simple_select_many_batch(
             table="push_rules_enable",