diff --git a/cluster.go b/cluster.go
index 6aacd03..a53b793 100644
--- a/cluster.go
+++ b/cluster.go
@@ -39,6 +39,8 @@ type ClusterClient struct {
 	reloading uint32
 }
 
+var _ Cmdable = (*ClusterClient)(nil)
+
 // NewClusterClient returns a Redis Cluster client as described in
 // http://redis.io/topics/cluster-spec.
 func NewClusterClient(opt *ClusterOptions) *ClusterClient {
diff --git a/commands.go b/commands.go
index 99314b9..f117329 100644
--- a/commands.go
+++ b/commands.go
@@ -41,6 +41,9 @@ func formatSec(dur time.Duration) string {
 }
 
 type Cmdable interface {
+	Pipeline() *Pipeline
+	Pipelined(fn func(*Pipeline) error) ([]Cmder, error)
+
 	Echo(message interface{}) *StringCmd
 	Ping() *StatusCmd
 	Quit() *StatusCmd
@@ -247,8 +250,6 @@ func (c *cmdable) WrapProcess(createWrapper func(oldProcess func(cmd Cmder) erro
 	c.process = createWrapper(c.process)
 }
 
-var _ Cmdable = (*cmdable)(nil)
-
 type statefulCmdable struct {
 	process func(cmd Cmder) error
 }
diff --git a/redis.go b/redis.go
index b8ceab5..ea0a2b4 100644
--- a/redis.go
+++ b/redis.go
@@ -150,6 +150,8 @@ type Client struct {
 	cmdable
 }
 
+var _ Cmdable = (*Client)(nil)
+
 func newClient(opt *Options, pool pool.Pooler) *Client {
 	base := baseClient{opt: opt, connPool: pool}
 	client := &Client{
diff --git a/ring.go b/ring.go
index 39733e2..5b2fdde 100644
--- a/ring.go
+++ b/ring.go
@@ -133,6 +133,8 @@ type Ring struct {
 	closed bool
 }
 
+var _ Cmdable = (*Ring)(nil)
+
 func NewRing(opt *RingOptions) *Ring {
 	const nreplicas = 100
 	opt.init()