diff --git a/sequelize/sequelize.d.ts b/sequelize/sequelize.d.ts
index 0e84373a6..d14f9711c 100644
--- a/sequelize/sequelize.d.ts
+++ b/sequelize/sequelize.d.ts
@@ -3123,7 +3123,7 @@ declare module "sequelize" {
             /**
              * If this column references another table, provide it here as a Model, or a string
              */
-            model?: Model<any, any>;
+            model?: string | Model<any, any>;
 
             /**
              * The column of the foreign table that this column references