diff --git a/packages/model-typings/src/updater.ts b/packages/model-typings/src/updater.ts
index 33ec78f4b86be..fe8354479c1f1 100644
--- a/packages/model-typings/src/updater.ts
+++ b/packages/model-typings/src/updater.ts
@@ -1,15 +1,18 @@
 /* eslint-disable @typescript-eslint/naming-convention */
-import type { Join, NestedPaths, PropertyType, ArrayElement, NestedPathsOfType, Filter } from 'mongodb';
+import type { Join, NestedPaths, PropertyType, ArrayElement, NestedPathsOfType, Filter, UpdateFilter } from 'mongodb';
 
 export interface Updater<T extends { _id: string }> {
 	set<P extends SetProps<T>, K extends keyof P>(key: K, value: P[K]): Updater<T>;
 	unset<K extends keyof UnsetProps<T>>(key: K): Updater<T>;
 	inc<K extends keyof IncProps<T>>(key: K, value: number): Updater<T>;
-	addToSet<K extends keyof AddToSetProps<T>>(key: K, value: AddToSetProps<T>[K]): Updater<T>;
+	addToSet<K extends keyof AddToSetProps<T>>(key: K, value: ArrayElementType<AddToSetProps<T>[K]>): Updater<T>;
 	persist(query: Filter<T>): Promise<void>;
 	hasChanges(): boolean;
+	getUpdateFilter(): UpdateFilter<T>;
 }
 
+type ArrayElementType<T> = T extends (infer E)[] ? E : T;
+
 export type SetProps<TSchema extends { _id: string }> = Readonly<
 	{
 		[Property in Join<NestedPaths<TSchema, []>, '.'>]: PropertyType<TSchema, Property>;
diff --git a/packages/models/src/updater.spec.ts b/packages/models/src/updater.spec.ts
index 4decc57d7c3ba..ae75400bd9eef 100644
--- a/packages/models/src/updater.spec.ts
+++ b/packages/models/src/updater.spec.ts
@@ -1,3 +1,5 @@
+import type { IOmnichannelRoom } from '@rocket.chat/core-typings';
+
 import { UpdaterImpl } from './updater';
 
 test('updater typings', () => {
@@ -15,6 +17,20 @@ test('updater typings', () => {
 		e: string[];
 	}>({} as any);
 
+	const omnichannel = new UpdaterImpl<IOmnichannelRoom>({} as any);
+	omnichannel.addToSet('v.activity', 'asd');
+	// @ts-expect-error
+	omnichannel.addToSet('v.activity', 1);
+	// @ts-expect-error
+	omnichannel.addToSet('v.activity', {
+		asdas: 1,
+	});
+
+	// @ts-expect-error
+	omnichannel.addToSet('v.activity.asd', {
+		asdas: 1,
+	});
+
 	updater.addToSet('e', 'a');
 
 	// @ts-expect-error
@@ -160,7 +176,7 @@ test('it should add items to array', async () => {
 		{
 			_id: 'test',
 		},
-		{ $addToSet: { $each: { a: ['b', 'c'] } } },
+		{ $addToSet: { a: { $each: ['b', 'c'] } } },
 	);
 });
 
diff --git a/packages/models/src/updater.ts b/packages/models/src/updater.ts
index ef163ea09e40e..361e228e65acf 100644
--- a/packages/models/src/updater.ts
+++ b/packages/models/src/updater.ts
@@ -71,12 +71,12 @@ export class UpdaterImpl<T extends { _id: string }> implements Updater<T> {
 		return Object.keys(this.getUpdateFilter()).length > 0;
 	}
 
-	private getUpdateFilter() {
+	getUpdateFilter() {
 		return {
 			...(this._set && { $set: Object.fromEntries(this._set) }),
 			...(this._unset && { $unset: Object.fromEntries([...this._unset.values()].map((k) => [k, 1])) }),
 			...(this._inc && { $inc: Object.fromEntries(this._inc) }),
-			...(this._addToSet && { $addToSet: { $each: Object.fromEntries(this._addToSet) } }),
+			...(this._addToSet && { $addToSet: Object.fromEntries([...this._addToSet.entries()].map(([k, v]) => [k, { $each: v }])) }),
 		} as unknown as UpdateFilter<T>;
 	}
 }