diff --git a/ts/test-node/logging/uploadDebugLogs_test.ts b/ts/test-node/logging/uploadDebugLogs_test.ts
index ff01d161e..bd6bc1234 100644
--- a/ts/test-node/logging/uploadDebugLogs_test.ts
+++ b/ts/test-node/logging/uploadDebugLogs_test.ts
@@ -18,7 +18,7 @@ describe('upload', () => {
   beforeEach(function beforeEach() {
     this.sandbox = sinon.createSandbox();
 
-    this.sandbox.stub(process, 'platform').get(() => 'linux');
+    this.sandbox.stub(process, 'platform').get(() => 'freebsd');
 
     this.fakeGet = this.sandbox.stub(got, 'get');
     this.fakePost = this.sandbox.stub(got, 'post');
@@ -48,7 +48,7 @@ describe('upload', () => {
     sinon.assert.calledOnce(this.fakeGet);
     sinon.assert.calledWith(this.fakeGet, 'https://debuglogs.org/', {
       responseType: 'json',
-      headers: { 'User-Agent': 'Signal-Desktop/1.2.3 Linux' },
+      headers: { 'User-Agent': 'Signal-Desktop/1.2.3' },
       timeout: { request: durations.MINUTE },
     });
 
@@ -56,7 +56,7 @@ describe('upload', () => {
 
     sinon.assert.calledOnce(this.fakePost);
     sinon.assert.calledWith(this.fakePost, 'https://example.com/fake-upload', {
-      headers: { 'User-Agent': 'Signal-Desktop/1.2.3 Linux' },
+      headers: { 'User-Agent': 'Signal-Desktop/1.2.3' },
       timeout: { request: durations.MINUTE },
       body: sinon.match((value: unknown) => {
         if (!(value instanceof FormData)) {
diff --git a/ts/test-node/util/getUserAgent_test.ts b/ts/test-node/util/getUserAgent_test.ts
index 45527d600..4761d1ae6 100644
--- a/ts/test-node/util/getUserAgent_test.ts
+++ b/ts/test-node/util/getUserAgent_test.ts
@@ -17,21 +17,30 @@ describe('getUserAgent', () => {
 
   it('returns the right User-Agent on Windows', function test() {
     this.sandbox.stub(process, 'platform').get(() => 'win32');
-    assert.strictEqual(getUserAgent('1.2.3'), 'Signal-Desktop/1.2.3 Windows');
+    assert.strictEqual(
+      getUserAgent('1.2.3', '10.0.22000'),
+      'Signal-Desktop/1.2.3 Windows 10.0.22000'
+    );
   });
 
   it('returns the right User-Agent on macOS', function test() {
     this.sandbox.stub(process, 'platform').get(() => 'darwin');
-    assert.strictEqual(getUserAgent('1.2.3'), 'Signal-Desktop/1.2.3 macOS');
+    assert.strictEqual(
+      getUserAgent('1.2.3', '21.5.0'),
+      'Signal-Desktop/1.2.3 macOS 21.5.0'
+    );
   });
 
   it('returns the right User-Agent on Linux', function test() {
     this.sandbox.stub(process, 'platform').get(() => 'linux');
-    assert.strictEqual(getUserAgent('1.2.3'), 'Signal-Desktop/1.2.3 Linux');
+    assert.strictEqual(
+      getUserAgent('1.2.3', '20.04'),
+      'Signal-Desktop/1.2.3 Linux 20.04'
+    );
   });
 
   it('omits the platform on unsupported platforms', function test() {
     this.sandbox.stub(process, 'platform').get(() => 'freebsd');
-    assert.strictEqual(getUserAgent('1.2.3'), 'Signal-Desktop/1.2.3');
+    assert.strictEqual(getUserAgent('1.2.3', '13.1'), 'Signal-Desktop/1.2.3');
   });
 });
diff --git a/ts/util/getUserAgent.ts b/ts/util/getUserAgent.ts
index 55b4e07da..3e7c379d0 100644
--- a/ts/util/getUserAgent.ts
+++ b/ts/util/getUserAgent.ts
@@ -1,6 +1,8 @@
 // Copyright 2020 Signal Messenger, LLC
 // SPDX-License-Identifier: AGPL-3.0-only
 
+import os from 'os';
+
 import { getOwn } from './getOwn';
 
 const PLATFORM_STRINGS: { [platform: string]: string } = {
@@ -9,12 +11,19 @@ const PLATFORM_STRINGS: { [platform: string]: string } = {
   linux: 'Linux',
 };
 
-export function getUserAgent(appVersion: string): string {
+export function getUserAgent(
+  appVersion: string,
+  release = os.release()
+): string {
   // `process.platform` could be missing if someone figures out how to compile Signal on
   //   an unsupported OS and forgets to update this file. We'd rather send nothing than
   //   crash.
   const platformString = getOwn(PLATFORM_STRINGS, process.platform);
-  const platformStringWithSpace = platformString ? ` ${platformString}` : '';
 
-  return `Signal-Desktop/${appVersion}${platformStringWithSpace}`;
+  let result = `Signal-Desktop/${appVersion}`;
+  if (platformString) {
+    result += ` ${platformString} ${release}`;
+  }
+
+  return result;
 }