1 files changed, 1 insertions, 1 deletions
diff --git a/synapse/util/caches/expiringcache.py b/synapse/util/caches/expiringcache.py
index 462016f820..8017c031ee 100644
--- a/synapse/util/caches/expiringcache.py
+++ b/synapse/util/caches/expiringcache.py
@@ -142,7 +142,7 @@ class ExpiringCache(Generic[KT, VT]):
             return default
 
         if self.iterable:
-            self.metrics.inc_evictions(EvictionReason.invalidation, len(value.value))  # type: ignore[arg-type]
+            self.metrics.inc_evictions(EvictionReason.invalidation, len(value.value))
         else:
             self.metrics.inc_evictions(EvictionReason.invalidation)