diff --git a/src/ol/geom/geometry.js b/src/ol/geom/geometry.js
index 5a09b7db31..54a2a310cb 100644
--- a/src/ol/geom/geometry.js
+++ b/src/ol/geom/geometry.js
@@ -112,6 +112,8 @@ ol.geom.Geometry.prototype.closestPointXY = goog.abstractMethod;
 
 
 /**
+ * Return the closest point of the geometry to the passed point as
+ * {@link ol.Coordinate coordinate}.
  * @param {ol.Coordinate} point Point.
  * @param {ol.Coordinate=} opt_closestPoint Closest point.
  * @return {ol.Coordinate} Closest point.