1 files changed, 1 insertions, 1 deletions

diff --git a/synapse/util/caches/descriptors.py b/synapse/util/caches/descriptors.py

index 84f5ae22c3..2e8f6543e5 100644
--- a/synapse/util/caches/descriptors.py
+++ b/synapse/util/caches/descriptors.py
@@ -271,7 +271,7 @@ class _CacheDescriptorBase(object):
         else:
             self.function_to_call = orig
 
-        arg_spec = inspect.getargspec(orig)
+        arg_spec = inspect.getfullargspec(orig)
         all_args = arg_spec.args
 
         if "cache_context" in all_args: