diff --git a/src/query-builder/on-conflict-builder.ts b/src/query-builder/on-conflict-builder.ts
index 575936226..f5ce407da 100644
--- a/src/query-builder/on-conflict-builder.ts
+++ b/src/query-builder/on-conflict-builder.ts
@@ -15,6 +15,7 @@ import {
   UpdateObjectExpression,
   parseUpdateObjectExpression,
 } from '../parser/update-set-parser.js'
+import { Updateable } from '../util/column-type.js'
 import { freeze } from '../util/object-utils.js'
 import { preventAwait } from '../util/prevent-await.js'
 import { AnyColumn, SqlBool } from '../util/type-utils.js'
@@ -257,7 +258,7 @@ export interface OnConflictBuilderProps {
 preventAwait(OnConflictBuilder, "don't await OnConflictBuilder instances.")
 
 export type OnConflictDatabase<DB, TB extends keyof DB> = {
-  [K in keyof DB | 'excluded']: K extends keyof DB ? DB[K] : DB[TB]
+  [K in keyof DB | 'excluded']: Updateable<K extends keyof DB ? DB[K] : DB[TB]>
 }
 
 export type OnConflictTables<TB> = TB | 'excluded'