diff --git a/src/ol/control/scalelinecontrol.js b/src/ol/control/scalelinecontrol.js
index cf5eeb1e49..66e1ef499a 100644
--- a/src/ol/control/scalelinecontrol.js
+++ b/src/ol/control/scalelinecontrol.js
@@ -141,6 +141,7 @@ ol.control.ScaleLine.LEADING_DIGITS = [1, 2, 5];
 
 
 /**
+ * Return the units to use in the scale line.
  * @return {ol.control.ScaleLineUnits|undefined} The units to use in the scale
  *     line.
  * @observable
@@ -153,6 +154,7 @@ ol.control.ScaleLine.prototype.getUnits = function() {
 
 
 /**
+ * Update the scale line element.
  * @param {ol.MapEvent} mapEvent Map event.
  * @this {ol.control.ScaleLine}
  * @api
@@ -177,6 +179,7 @@ ol.control.ScaleLine.prototype.handleUnitsChanged_ = function() {
 
 
 /**
+ * Set the units to use in the scale line.
  * @param {ol.control.ScaleLineUnits} units The units to use in the scale line.
  * @observable
  * @api stable