diff --git a/libs/ultrasonic-sensor/_locales/ultrasonic-sensor-jsdoc-strings.json b/libs/ultrasonic-sensor/_locales/ultrasonic-sensor-jsdoc-strings.json
index 3bb5fc2a..9aa4671b 100644
--- a/libs/ultrasonic-sensor/_locales/ultrasonic-sensor-jsdoc-strings.json
+++ b/libs/ultrasonic-sensor/_locales/ultrasonic-sensor-jsdoc-strings.json
@@ -1,5 +1,5 @@
 {
-  "sensors.UltraSonicSensor.distance": "Gets the distance from the sonar in millimeters",
+  "sensors.UltraSonicSensor.distance": "Gets the distance from the sonar in centimeters",
   "sensors.UltraSonicSensor.onEvent": "Registers code to run when the given color is close",
   "sensors.UltraSonicSensor.onEvent|param|handler": "the code to run when detected",
   "sensors.UltraSonicSensor.waitUntil": "Waits for the event to occur"
diff --git a/libs/ultrasonic-sensor/ultrasonic.ts b/libs/ultrasonic-sensor/ultrasonic.ts
index e7d8826d..ef6628af 100644
--- a/libs/ultrasonic-sensor/ultrasonic.ts
+++ b/libs/ultrasonic-sensor/ultrasonic.ts
@@ -67,7 +67,7 @@ namespace sensors {
         }
 
         /**
-         * Gets the distance from the sonar in millimeters
+         * Gets the distance from the sonar in centimeters
          * @param sensor the ultrasonic sensor port
          */
         //% help=input/ultrasonic/distance