diff --git a/acl/acl-mongodbBackend-tests.ts b/acl/acl-mongodbBackend-tests.ts
index 01c9af9082..31411b65c7 100644
--- a/acl/acl-mongodbBackend-tests.ts
+++ b/acl/acl-mongodbBackend-tests.ts
@@ -1,4 +1,4 @@
-/// <reference path='acl.d.ts'/>
+/// <reference path='acl-mongodbBackend.d.ts'/>
 
 // https://github.com/OptimalBits/node_acl/blob/master/Readme.md
 import Acl = require('acl');
@@ -14,3 +14,4 @@ acl.allow('guest', 'blogs', 'view');
 
 // allow function accepts arrays as any parameter
 acl.allow('member', 'blogs', ['edit','view', 'delete']);
+
diff --git a/acl/acl-mongodbBackend.d.ts b/acl/acl-mongodbBackend.d.ts
new file mode 100644
index 0000000000..8dbfb7e905
--- /dev/null
+++ b/acl/acl-mongodbBackend.d.ts
@@ -0,0 +1,22 @@
+// Type definitions for node_acl 0.4.7
+// Project: https://github.com/optimalbits/node_acl
+// Definitions by: Qubo <https://github.com/tkQubo>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+/// <reference path="acl.d.ts" />
+/// <reference path="../mongodb/mongodb.d.ts" />
+
+declare module "acl" {
+  import mongo = require('mongodb');
+
+  interface AclStatic {
+    mongodbBackend: MongodbBackendStatic;
+  }
+
+  interface MongodbBackend extends Backend<Callback> { }
+  interface MongodbBackendStatic {
+    new(db: mongo.Db, prefix: string, useSingle: boolean): MongodbBackend;
+    new(db: mongo.Db, prefix: string): MongodbBackend;
+    new(db: mongo.Db): MongodbBackend;
+  }
+}
diff --git a/acl/acl-redisBackend-test.ts b/acl/acl-redisBackend-test.ts
index 273aeab3b7..e1bf29af49 100644
--- a/acl/acl-redisBackend-test.ts
+++ b/acl/acl-redisBackend-test.ts
@@ -1,4 +1,4 @@
-/// <reference path='acl.d.ts'/>
+/// <reference path='acl-redisBackend.d.ts'/>
 
 // https://github.com/OptimalBits/node_acl/blob/master/Readme.md
 import Acl = require('acl');
diff --git a/acl/acl-redisBackend.d.ts b/acl/acl-redisBackend.d.ts
new file mode 100644
index 0000000000..e199f8b81c
--- /dev/null
+++ b/acl/acl-redisBackend.d.ts
@@ -0,0 +1,21 @@
+// Type definitions for node_acl 0.4.7
+// Project: https://github.com/optimalbits/node_acl
+// Definitions by: Qubo <https://github.com/tkQubo>
+// Definitions: https://github.com/borisyankov/DefinitelyTyped
+
+/// <reference path="acl.d.ts" />
+/// <reference path='../redis/redis.d.ts'/>
+
+declare module "acl" {
+  import redis = require('redis');
+
+  interface AclStatic {
+    redisBackend: RedisBackendStatic;
+  }
+
+  interface RedisBackend extends Backend<redis.RedisClient> { }
+  interface RedisBackendStatic {
+    new(redis: redis.RedisClient, prefix: string): RedisBackend;
+    new(redis: redis.RedisClient): RedisBackend;
+  }
+}
diff --git a/acl/acl.d.ts b/acl/acl.d.ts
index 57e85d9d58..5d0498fed9 100644
--- a/acl/acl.d.ts
+++ b/acl/acl.d.ts
@@ -6,9 +6,6 @@
 /// <reference path="../bluebird/bluebird.d.ts" />
 /// <reference path='../node/node.d.ts'/>
 
-/// <reference path='../redis/redis.d.ts'/>
-/// <reference path="../mongodb/mongodb.d.ts" />
-
 declare module "acl" {
   import http = require('http');
   import Promise = require("bluebird");
@@ -118,33 +115,6 @@ declare module "acl" {
     end: () => void;
   }
 
-  // for redis backend
-  import redis = require('redis');
-
-  interface AclStatic {
-    redisBackend: RedisBackendStatic;
-  }
-
-  interface RedisBackend extends Backend<redis.RedisClient> { }
-  interface RedisBackendStatic {
-    new(redis: redis.RedisClient, prefix: string): RedisBackend;
-    new(redis: redis.RedisClient): RedisBackend;
-  }
-
-  // for mongodb backend
-  import mongo = require('mongodb');
-
-  interface AclStatic {
-    mongodbBackend: MongodbBackendStatic;
-  }
-
-  interface MongodbBackend extends Backend<Callback> { }
-  interface MongodbBackendStatic {
-    new(db: mongo.Db, prefix: string, useSingle: boolean): MongodbBackend;
-    new(db: mongo.Db, prefix: string): MongodbBackend;
-    new(db: mongo.Db): MongodbBackend;
-  }
-
   var _: AclStatic;
   export = _;
 }