diff --git a/src/sequelize.d.ts b/src/sequelize.d.ts
index 1ba1cfd1c8b0..3061d98a9cfb 100644
--- a/src/sequelize.d.ts
+++ b/src/sequelize.d.ts
@@ -169,7 +169,7 @@ export interface Config {
   };
 }
 
-export type Dialect = 'mysql' | 'postgres' | 'sqlite' | 'mariadb' | 'mssql' | 'db2' | 'snowflake';
+export type Dialect = 'mysql' | 'postgres' | 'sqlite' | 'mariadb' | 'mssql' | 'db2' | 'snowflake' | 'oracle';
 
 export interface RetryOptions {
   match?: (RegExp | string | Function)[];