diff --git a/libraries/AP_InertialSensor/AP_InertialSensor.cpp b/libraries/AP_InertialSensor/AP_InertialSensor.cpp
index 95e55793b0..78b9f23237 100644
--- a/libraries/AP_InertialSensor/AP_InertialSensor.cpp
+++ b/libraries/AP_InertialSensor/AP_InertialSensor.cpp
@@ -18,7 +18,7 @@ const AP_Param::GroupInfo AP_InertialSensor::var_info[] PROGMEM = {
     // @DisplayName: IMU Product ID
     // @Description: Which type of IMU is installed (read-only). 
     // @User: Advanced
-    // @Values: 0:Unknown,1:APM1-1280,2:APM1-2560,88:APM2,3:SITL,4:PX4v1,5:PX4v2,Flymaple:256,Linux:257
+    // @Values: 0:Unknown,1:APM1-1280,2:APM1-2560,88:APM2,3:SITL,4:PX4v1,5:PX4v2,256:Flymaple,257:Linux
     AP_GROUPINFO("PRODUCT_ID",  0, AP_InertialSensor, _product_id,   0),
 
     // @Param: ACCSCAL_X