diff --git a/TESTED.md b/TESTED.md
index 50ca5e0..b39436b 100644
--- a/TESTED.md
+++ b/TESTED.md
@@ -10,7 +10,7 @@ This is not by any means an exhaustive list. Many more devices are supported but
 | MX Anywhere S2 |     Yes     | `Wireless Mobile Mouse MX Anywhere 2S` |
 | MX Anywhere 3  |     Yes     |            `MX Anywhere 3`             |
 |  MX Vertical   |     Yes     | `MX Vertical Advanced Ergonomic Mouse` |
-|    MX Ergo     |     Yes     |                                        |
+|    MX Ergo     |     Yes     |   `MX Ergo Multi-Device Trackball `    |
 |      M720      |     Yes     |  `M720 Triathlon Multi-Device Mouse`   |
 |      M590      |     Yes     |     `M585/M590 Multi-Device Mouse`     |
 |      T400      |     Yes     |        `Zone Touch Mouse T400`         |