diff --git a/lib/associations/base.d.ts b/lib/associations/base.d.ts
index da91ef3..93b5d0c 100644
--- a/lib/associations/base.d.ts
+++ b/lib/associations/base.d.ts
@@ -59,6 +59,11 @@ export interface AssociationOptions {
    */
   hooks?: boolean;
 
+  /**
+  * The name of the foreign key in the source table
+  */
+  sourceKey?: string | ForeignKeyOptions;
+
   /**
    * The alias of this model, in singular form. See also the `name` option passed to `sequelize.define`. If
    * you create multiple associations between the same tables, you should provide an alias to be able to
@@ -68,6 +73,7 @@ export interface AssociationOptions {
    */
   as?: string | { singular: string, plural: string };
 
+
   /**
    * The name of the foreign key in the target table or an object representing the type definition for the
    * foreign column (see `Sequelize.define` for syntax). When using an object, you can add a `name` property