diff --git a/lib/redis/namespace.rb b/lib/redis/namespace.rb
index cfa83a8..694419c 100644
--- a/lib/redis/namespace.rb
+++ b/lib/redis/namespace.rb
@@ -127,6 +127,7 @@ class Namespace
       "zcard"            => [ :first ],
       "zcount"           => [ :first ],
       "zincrby"          => [ :first ],
+      "zinterstore"      => [ :all ],
       "zrange"           => [ :first ],
       "zrangebyscore"    => [ :first ],
       "zrank"            => [ :first ],