2 files changed, 2 insertions, 4 deletions
diff --git a/synapse/util/caches/stream_change_cache.py b/synapse/util/caches/stream_change_cache.py
index 0469e7d120..e81e468899 100644
--- a/synapse/util/caches/stream_change_cache.py
+++ b/synapse/util/caches/stream_change_cache.py
@@ -14,11 +14,10 @@
 
 import logging
 import math
-from typing import Dict, FrozenSet, List, Mapping, Optional, Set, Union
+from typing import Collection, Dict, FrozenSet, List, Mapping, Optional, Set, Union
 
 from sortedcontainers import SortedDict
 
-from synapse.types import Collection
 from synapse.util import caches
 
 logger = logging.getLogger(__name__)
diff --git a/synapse/util/iterutils.py b/synapse/util/iterutils.py
index 6f73b1d56d..abfdc29832 100644
--- a/synapse/util/iterutils.py
+++ b/synapse/util/iterutils.py
@@ -15,6 +15,7 @@
 import heapq
 from itertools import islice
 from typing import (
+    Collection,
     Dict,
     Generator,
     Iterable,
@@ -26,8 +27,6 @@ from typing import (
     TypeVar,
 )
 
-from synapse.types import Collection
-
 T = TypeVar("T")