diff --git a/redis.go b/redis.go
index 3e78c85..53d66e7 100644
--- a/redis.go
+++ b/redis.go
@@ -18,7 +18,7 @@ func (rc RedisCmd) MarshalJSON() ([]byte, error) {
 }
 
 func (rc RedisCmd) MarshalBinary() ([]byte, error) {
-	return rc.MarshalJSON()
+	return []byte(rc.String()), nil
 }
 
 const (