diff --git a/weed/notification/configuration.go b/weed/notification/configuration.go
index 6ac693ad8..96087987d 100644
--- a/weed/notification/configuration.go
+++ b/weed/notification/configuration.go
@@ -3,8 +3,18 @@ package notification
 import (
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/spf13/viper"
+	"github.com/chrislusf/seaweedfs/weed/util"
+	"github.com/golang/protobuf/proto"
 )
 
+type MessageQueue interface {
+	// GetName gets the name to locate the configuration in filer.toml file
+	GetName() string
+	// Initialize initializes the file store
+	Initialize(configuration util.Configuration) error
+	SendMessage(key string, message proto.Message) error
+}
+
 var (
 	MessageQueues []MessageQueue
 
diff --git a/weed/notification/message_queue.go b/weed/notification/message_queue.go
deleted file mode 100644
index 18c4a8830..000000000
--- a/weed/notification/message_queue.go
+++ /dev/null
@@ -1,14 +0,0 @@
-package notification
-
-import (
-	"github.com/chrislusf/seaweedfs/weed/util"
-	"github.com/golang/protobuf/proto"
-)
-
-type MessageQueue interface {
-	// GetName gets the name to locate the configuration in message_queue.toml file
-	GetName() string
-	// Initialize initializes the file store
-	Initialize(configuration util.Configuration) error
-	SendMessage(key string, message proto.Message) error
-}