diff --git a/Firmware-Compatibility.md b/Firmware-Compatibility.md
index 7a24e96..0e7c48a 100644
--- a/Firmware-Compatibility.md
+++ b/Firmware-Compatibility.md
@@ -67,3 +67,4 @@ Some boards have 6 wires on the hall sensors cable, with an additional white wir
 
 ## Troubleshooting
 * Motors are cogging/not running in a smooth way - please try to swap the phases
+* In speed mode, wheel are running at maximum speed - find the right mapping for hall sensors, firmware probably measures a speed with opposite sign