diff --git a/src/ol/geom2/linestringcollection.js b/src/ol/geom2/linestringcollection.js
index 56a83369e5..06a49b13a9 100644
--- a/src/ol/geom2/linestringcollection.js
+++ b/src/ol/geom2/linestringcollection.js
@@ -16,6 +16,7 @@ ol.geom2.LineString;
 
 
 /**
+ * This is an internal class that will be removed from the API.
  * @constructor
  * @param {ol.structs.Buffer} buf Buffer.
  * @param {Object.<number, Array.<number>>=} opt_ranges Ranges.
@@ -54,6 +55,7 @@ ol.geom2.LineStringCollection.createEmpty = function(capacity, opt_dim) {
 
 
 /**
+ * This is an internal function that will be removed from the API.
  * @param {Array.<ol.geom2.LineString>} unpackedLineStrings Unpacked line
  *     strings.
  * @param {number=} opt_capacity Capacity.
diff --git a/src/ol/geom2/pointcollection.js b/src/ol/geom2/pointcollection.js
index 877071878d..c9ba6e8336 100644
--- a/src/ol/geom2/pointcollection.js
+++ b/src/ol/geom2/pointcollection.js
@@ -15,6 +15,7 @@ ol.geom2.Point;
 
 
 /**
+ * This is an internal class that will be removed from the API.
  * @constructor
  * @param {ol.structs.Buffer} buf Buffer.
  * @param {number=} opt_dim Dimension.
@@ -35,6 +36,7 @@ ol.geom2.PointCollection = function(buf, opt_dim) {
 
 
 /**
+ * This is an internal function that will be removed from the API.
  * @param {number} capacity Capacity.
  * @param {number=} opt_dim Dimension.
  * @return {ol.geom2.PointCollection} Point collection.
@@ -47,6 +49,7 @@ ol.geom2.PointCollection.createEmpty = function(capacity, opt_dim) {
 
 
 /**
+ * This is an internal function that will be removed from the API.
  * @param {Array.<ol.geom2.Point>} unpackedPoints Unpacked points.
  * @param {number=} opt_capacity Capacity.
  * @param {number=} opt_dim Dimension.
diff --git a/src/ol/layer/vectorlayer2.js b/src/ol/layer/vectorlayer2.js
index 8ca94375b6..471fdb8b75 100644
--- a/src/ol/layer/vectorlayer2.js
+++ b/src/ol/layer/vectorlayer2.js
@@ -6,6 +6,7 @@ goog.require('ol.source.VectorSource2');
 
 
 /**
+ * This is an internal class that will be removed from the API.
  * @constructor
  * @extends {ol.layer.Layer}
  * @param {ol.layer.LayerOptions} options Options.
diff --git a/src/ol/source/vectorsource2.js b/src/ol/source/vectorsource2.js
index 095859b431..e5e72f37bd 100644
--- a/src/ol/source/vectorsource2.js
+++ b/src/ol/source/vectorsource2.js
@@ -7,6 +7,7 @@ goog.require('ol.source.Source');
 
 
 /**
+ * This is an internal class that will be removed from the API.
  * @constructor
  * @extends {ol.source.Source}
  * @param {ol.source.VectorSource2Options} options Options.