diff --git a/flask_caching/backends/memcache.py b/flask_caching/backends/memcache.py
index ec9a9c54..11d267b2 100644
--- a/flask_caching/backends/memcache.py
+++ b/flask_caching/backends/memcache.py
@@ -233,7 +233,7 @@ def __init__(
         password=None,
         **kwargs
     ):
-        super(SASLMemcachedCache, self).__init__(default_timeout)
+        super(SASLMemcachedCache, self).__init__(default_timeout=default_timeout)
 
         if servers is None:
             servers = ["127.0.0.1:11211"]