diff --git a/api/client.go b/api/client.go
index 338a5b0de1..4d3b49d96e 100644
--- a/api/client.go
+++ b/api/client.go
@@ -1041,8 +1041,8 @@ func (cli *DockerCli) CmdPush(args ...string) error {
 }
 
 func (cli *DockerCli) CmdPull(args ...string) error {
-	cmd := cli.Subcmd("pull", "NAME", "Pull an image or a repository from the registry")
-	tag := cmd.String([]string{"t", "-tag"}, "", "Download tagged image in repository")
+	cmd := cli.Subcmd("pull", "NAME[:TAG]", "Pull an image or a repository from the registry")
+	tag := cmd.String([]string{"#t", "#-tag"}, "", "Download tagged image in repository")
 	if err := cmd.Parse(args); err != nil {
 		return nil
 	}