1 files changed, 1 insertions, 1 deletions
diff --git a/synapse/crypto/event_signing.py b/synapse/crypto/event_signing.py
index 23b799ac32..1a293f1df0 100644
--- a/synapse/crypto/event_signing.py
+++ b/synapse/crypto/event_signing.py
@@ -51,7 +51,7 @@ def check_event_content_hash(
     # some malformed events lack a 'hashes'. Protect against it being missing
     # or a weird type by basically treating it the same as an unhashed event.
     hashes = event.get("hashes")
-    # nb it might be a frozendict or a dict
+    # nb it might be a immutabledict or a dict
     if not isinstance(hashes, collections.abc.Mapping):
         raise SynapseError(
             400, "Malformed 'hashes': %s" % (type(hashes),), Codes.UNAUTHORIZED