diff --git a/types/sequelize/index.d.ts b/types/sequelize/index.d.ts
index 952b3a7aea..8216424394 100644
--- a/types/sequelize/index.d.ts
+++ b/types/sequelize/index.d.ts
@@ -5,6 +5,7 @@
 //                 Ivan Drinchev <https://github.com/drinchev>
 //                 Brendan Abolivier <https://github.com/babolivier>
 //                 Patsakol Tangjitcharoenchai <https://github.com/kukoo1>
+//                 Sebastien Bramille <https://github.com/oktapodia>
 //                 Nick Mueller <https://github.com/morpheusxaut>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.3
@@ -4176,7 +4177,7 @@ declare namespace sequelize {
         /**
          * Adds a new index to a table
          */
-        addIndex(tableName: string | Object, attributes: string[], options?: QueryOptions,
+        addIndex(tableName: string | Object, attributes: string[], options?: DefineIndexOptions,
             rawTablename?: string): Promise<void>;
 
         /**
@@ -4826,6 +4827,38 @@ declare namespace sequelize {
 
     }
 
+    interface DefineIndexOptions {
+        /**
+         * The index type
+         */
+        indicesType?: 'UNIQUE' | 'FULLTEXT' | 'SPATIAL';
+
+        /**
+         * The name of the index. Default is __
+         */
+        indexName?: string;
+
+        /**
+         * For FULLTEXT columns set your parser
+         */
+        parser?: string;
+
+        /**
+         * Set a type for the index, e.g. BTREE. See the documentation of the used dialect
+         */
+        indexType?: string;
+
+        /**
+         * A function that receives the sql query, e.g. console.log
+         */
+        logging?: Function;
+
+        /**
+         * A hash of attributes to limit your index(Filtered Indexes - MSSQL & PostgreSQL only)
+         */
+        where?: AnyWhereOptions;
+    }
+
     /**
      * Interface for indexes property in DefineOptions
      *
diff --git a/types/sequelize/sequelize-tests.ts b/types/sequelize/sequelize-tests.ts
index 4423ed9246..4ecbb8a1b0 100644
--- a/types/sequelize/sequelize-tests.ts
+++ b/types/sequelize/sequelize-tests.ts
@@ -1091,6 +1091,7 @@ queryInterface.createTable( 'table', { name : { type : Sequelize.STRING } }, { s
 queryInterface.addIndex( { schema : 'a', tableName : 'c' }, ['d', 'e'], { logging : function() {} }, 'schema_table' );
 queryInterface.showIndex( { schema : 'schema', tableName : 'table' }, { logging : function() {} } );
 queryInterface.addIndex( 'Group', ['from'] );
+queryInterface.addIndex( 'Group', ['from'], { indexName: 'group_from' } );
 queryInterface.describeTable( '_Users', { logging : function() {} } );
 queryInterface.createTable( 's', { table_id : { type : Sequelize.INTEGER, primaryKey : true, autoIncrement : true } } );
 /* NOTE https://github.com/DefinitelyTyped/DefinitelyTyped/pull/5590