diff --git a/apps/meteor/app/api/server/v1/im.ts b/apps/meteor/app/api/server/v1/im.ts
index fa274ef694673..32dbec80995d6 100644
--- a/apps/meteor/app/api/server/v1/im.ts
+++ b/apps/meteor/app/api/server/v1/im.ts
@@ -400,7 +400,7 @@ API.v1.addRoute(
 				...parseIds(starredIds, 'starred._id'),
 				...(pinned && pinned.toLowerCase() === 'true' ? { pinned: true } : {}),
 			};
-			const sortObj = { ts: sort?.ts ?? -1 };
+			const sortObj = sort?.ts ?? { ts: -1 };
 
 			const { cursor, totalCount } = Messages.findPaginated(ourQuery, {
 				sort: sortObj,
diff --git a/apps/meteor/tests/end-to-end/api/direct-message.ts b/apps/meteor/tests/end-to-end/api/direct-message.ts
index 3146d351798b1..e1056b419f204 100644
--- a/apps/meteor/tests/end-to-end/api/direct-message.ts
+++ b/apps/meteor/tests/end-to-end/api/direct-message.ts
@@ -527,6 +527,25 @@ describe('[Direct Messages]', () => {
 					expect(res.body).to.have.property('total', 1);
 				});
 		});
+
+		it('should return messages sorted by timestamp in ascending order', async () => {
+			await request
+				.get(api('im.messages'))
+				.set(testUserCredentials)
+				.query({
+					roomId: testUserDMRoom._id,
+					sort: '{"ts":1}',
+				})
+				.expect('Content-Type', 'application/json')
+				.expect(200)
+				.expect((res) => {
+					expect(res.body).to.have.property('success', true);
+					expect(res.body.messages).to.be.an('array').and.to.have.length.greaterThan(0);
+
+					const timestamps = res.body.messages.map((message: any) => message.ts);
+					expect(timestamps).to.eql(timestamps.slice().sort((a: string, b: string) => new Date(a).getTime() - new Date(b).getTime()));
+				});
+		});
 	});
 
 	describe('/im.messages.others', () => {