use formatters directory

README.md

diff --git a/README.md b/README.md
index 0e39601..f457193 100644
--- a/README.md
+++ b/README.md
@@ -321,10 +321,10 @@
     field to `true`.  To force no colored output even if there is a TTY  set the
     `DisableColors` field to `true`
 * `logrus.JSONFormatter`. Logs fields as JSON.
-* `logrus.LogstashFormatter`. Logs fields as Logstash Events (http://logstash.net).
+* `logrus_logstash.LogstashFormatter`. Logs fields as Logstash Events (http://logstash.net).
 
     ```go
-      logrus.SetFormatter(&logrus.LogstashFormatter{Type: “application_name"})
+      logrus.SetFormatter(&logrus_logstash.LogstashFormatter{Type: “application_name"})
     ```
 
 Third party logging formatters:

formatters/logstash/logstash_formatter.go

diff --git a/logstash_formatter.go b/formatters/logstash/logstash_formatter.go
similarity index 87%
rename from logstash_formatter.go
rename to formatters/logstash/logstash_formatter.go
index 99a3f7f..63ac133 100644
--- a/logstash_formatter.go
+++ b/formatters/logstash/logstash_formatter.go
@@ -1,8 +1,9 @@
-package logrus
+package logrus_logstash
 
 import (
 	"encoding/json"
 	"fmt"
+	"github.com/Sirupsen/logrus"
 	"time"
 )
 
@@ -12,7 +13,7 @@
 	Type string // if not empty use for logstash type field.
 }
 
-func (f *LogstashFormatter) Format(entry *Entry) ([]byte, error) {
+func (f *LogstashFormatter) Format(entry *logrus.Entry) ([]byte, error) {
 	entry.Data["@version"] = 1
 	entry.Data["@timestamp"] = entry.Time.Format(time.RFC3339)