diff --git a/types/sequelize/v3/index.d.ts b/types/sequelize/v3/index.d.ts
index 4e8084d3ee..3abf1b970f 100644
--- a/types/sequelize/v3/index.d.ts
+++ b/types/sequelize/v3/index.d.ts
@@ -3056,7 +3056,7 @@ declare namespace sequelize {
      * typesafety, but there is no way to pass the tests if we just remove it.
      */
     interface WhereOptions {
-        [field: string]: string | number | WhereLogic | WhereOptions | col | and | or | WhereGeometryOptions | Array<string | number> | object | null;
+        [field: string]: string | number | WhereLogic | WhereOptions | col | and | or | WhereGeometryOptions | Array<string | number> | object | boolean | null;
 
     }