diff --git a/synapse/storage/_base.py b/synapse/storage/_base.py

index 029f6612e6..49fa8614f2 100644
--- a/synapse/storage/_base.py
+++ b/synapse/storage/_base.py
@@ -166,7 +166,7 @@ class SQLBaseStore(object):
         self._txn_perf_counters = PerformanceCounters()
         self._get_event_counters = PerformanceCounters()
 
-        self._get_event_cache = Cache("*getEvent*", keylen=3, lru=True,
+        self._get_event_cache = Cache("*getEvent*", keylen=3,
                                       max_entries=hs.config.event_cache_size)
 
         self._state_group_cache = DictionaryCache(