diff --git a/synapse/state/__init__.py b/synapse/state/__init__.py

index a2992fd953..b34970e4d1 100644
--- a/synapse/state/__init__.py
+++ b/synapse/state/__init__.py
@@ -26,8 +26,8 @@ from twisted.internet import defer
 from synapse.api.constants import EventTypes, RoomVersions
 from synapse.events.snapshot import EventContext
 from synapse.state import v1
-from synapse.util.async import Linearizer
-from synapse.util.caches import CACHE_SIZE_FACTOR
+from synapse.util.async_helpers import Linearizer
+from synapse.util.caches import get_cache_factor_for
 from synapse.util.caches.expiringcache import ExpiringCache
 from synapse.util.logutils import log_function
 from synapse.util.metrics import Measure
@@ -38,7 +38,7 @@ logger = logging.getLogger(__name__)
 KeyStateTuple = namedtuple("KeyStateTuple", ("context", "type", "state_key"))
 
 
-SIZE_OF_CACHE = int(100000 * CACHE_SIZE_FACTOR)
+SIZE_OF_CACHE = 100000 * get_cache_factor_for("state_cache")
 EVICTION_TIMEOUT_SECONDS = 60 * 60