diff --git a/lib/redis/namespace.rb b/lib/redis/namespace.rb
index 1604d00..ea3a949 100644
--- a/lib/redis/namespace.rb
+++ b/lib/redis/namespace.rb
@@ -152,6 +152,7 @@ class Namespace
       "sinterstore"      => [ :all ],
       "sismember"        => [ :first ],
       "smembers"         => [ :first ],
+      "smismember"       => [ :first ],
       "smove"            => [ :exclude_last ],
       "sort"             => [ :sort  ],
       "spop"             => [ :first ],