diff --git a/distribution/legal/THIRDPARTY.md b/distribution/legal/THIRDPARTY.md
index 5caa03771..bd45f09d5 100644
--- a/distribution/legal/THIRDPARTY.md
+++ b/distribution/legal/THIRDPARTY.md
@@ -711,3 +711,33 @@
   SOFTWARE.
   ```
 </details>
+
+# Fluent UI System Icons (MIT)
+<details>
+  <summary>See License</summary>
+
+  ```
+  MIT License
+
+  Copyright (c) 2020 Microsoft Corporation
+
+  Permission is hereby granted, free of charge, to any person obtaining a copy
+  of this software and associated documentation files (the "Software"), to deal
+  in the Software without restriction, including without limitation the rights
+  to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+  copies of the Software, and to permit persons to whom the Software is
+  furnished to do so, subject to the following conditions:
+
+  The above copyright notice and this permission notice shall be included in all
+  copies or substantial portions of the Software.
+
+  THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+  IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+  FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+  AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+  LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+  OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+  SOFTWARE.
+  ```
+</details>
+