diff --git a/libraries/AP_Mount/AP_Mount_Alexmos.cpp b/libraries/AP_Mount/AP_Mount_Alexmos.cpp
index 4957fc33e9..6252a7819c 100644
--- a/libraries/AP_Mount/AP_Mount_Alexmos.cpp
+++ b/libraries/AP_Mount/AP_Mount_Alexmos.cpp
@@ -145,7 +145,7 @@ void AP_Mount_Alexmos::get_boardinfo()
 }
 
 /*
-  control_axis : send new angles to the gimbal at a fixed speed of 30 deg/s2
+  control_axis : send new angles to the gimbal at a fixed speed of 30 deg/s
 */
 void AP_Mount_Alexmos::control_axis(const Vector3f& angle, bool target_in_degrees)
 {
diff --git a/libraries/AP_Mount/AP_Mount_Alexmos.h b/libraries/AP_Mount/AP_Mount_Alexmos.h
index ea4c1334b0..20f1c35299 100644
--- a/libraries/AP_Mount/AP_Mount_Alexmos.h
+++ b/libraries/AP_Mount/AP_Mount_Alexmos.h
@@ -55,7 +55,7 @@
 #define AP_MOUNT_ALEXMOS_MODE_SPEED_ANGLE 3
 #define AP_MOUNT_ALEXMOS_MODE_RC 4
 
-#define AP_MOUNT_ALEXMOS_SPEED 30 // degree/s2
+#define AP_MOUNT_ALEXMOS_SPEED 30 // deg/s
 
 #define VALUE_TO_DEGREE(d) ((float)((d * 720) >> 15))
 #define DEGREE_TO_VALUE(d) ((int16_t)((float)(d)*(1.0f/0.02197265625f)))