diff --git a/src/ol/source/wmssource.js b/src/ol/source/wmssource.js
index def6b908ba..620be00285 100644
--- a/src/ol/source/wmssource.js
+++ b/src/ol/source/wmssource.js
@@ -3,7 +3,11 @@ goog.provide('ol.source.wms.ServerType');
 
 
 /**
+ * Available server types: `'carmentaserver'`, `'geoserver'`, `'mapserver'`,
+ *     `'qgis'`. These are servers that have vendor parameters beyond the WMS
+ *     specification that OpenLayers can make use of.
  * @enum {string}
+ * @todo api
  */
 ol.source.wms.ServerType = {
   CARMENTA_SERVER: 'carmentaserver',
diff --git a/src/ol/source/wmssource.jsdoc b/src/ol/source/wmssource.jsdoc
new file mode 100644
index 0000000000..ad8776496a
--- /dev/null
+++ b/src/ol/source/wmssource.jsdoc
@@ -0,0 +1,3 @@
+/**
+ * @namespace ol.source.wms
+ */