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-rw-r--r--synapse/storage/_base.py6
1 files changed, 3 insertions, 3 deletions
diff --git a/synapse/storage/_base.py b/synapse/storage/_base.py
index e1f29a3aca..a088a6175c 100644
--- a/synapse/storage/_base.py
+++ b/synapse/storage/_base.py
@@ -184,7 +184,7 @@ class CacheDescriptor(object):
             try:
                 cached_result_d = self.cache.get(keyargs)
 
-                observed = cached_result_d.observe()
+                observer = cached_result_d.observe()
                 if DEBUG_CACHES:
                     @defer.inlineCallbacks
                     def check_result(cached_result):
@@ -197,9 +197,9 @@ class CacheDescriptor(object):
                             )
                             raise ValueError("Stale cache entry")
                         defer.returnValue(cached_result)
-                    observed.addCallback(check_result)
+                    observer.addCallback(check_result)
 
-                return observed
+                return observer
             except KeyError:
                 # Get the sequence number of the cache before reading from the
                 # database so that we can tell if the cache is invalidated