diff --git a/sat/plugins/plugin_xep_0054.py b/sat/plugins/plugin_xep_0054.py
index 29c0753e..4c85df12 100644
--- a/sat/plugins/plugin_xep_0054.py
+++ b/sat/plugins/plugin_xep_0054.py
@@ -439,7 +439,7 @@ class XEP_0054_handler(XMPPHandler):
         """Check that hash in cache (i.e. computed hash) is the same as given one"""
         # XXX: if they differ, the avatar will be requested on each connection
         # TODO: try to avoid re-requesting avatar in this case
-        computed_hash = client._xep_0054_avatar_hashes[entity.full]
+        computed_hash = client._xep_0054_avatar_hashes[entity.full()]
         if computed_hash != given_hash:
             log.warning(
                 "computed hash differs from given hash for {entity}:\n"