diff --git a/src/types/config.model.ts b/src/types/config.model.ts
index 9a72713..4e89a02 100644
--- a/src/types/config.model.ts
+++ b/src/types/config.model.ts
@@ -15,6 +15,7 @@ export interface CustomPostgresConfig extends PoolConfig {
 export interface CustomPostgresReadOnlyConfig extends CustomPostgresConfig {
     weight: number;
     readTimeout: number;
+    fallbackOnFail: boolean;
 }
 
 export interface SBSConfig {