diff --git a/externs/olx.js b/externs/olx.js
index f2ae250a9a..a430044773 100644
--- a/externs/olx.js
+++ b/externs/olx.js
@@ -1995,6 +1995,25 @@ olx.format.WFSWriteGetFeatureOptions.prototype.geometryName;
 olx.format.WFSWriteGetFeatureOptions.prototype.propertyNames;
 
 
+/**
+ * Start index to use for WFS paging. This is a WFS 2.0 feature backported to
+ * WFS 1.1.0 by some Web Feature Services.
+ * @type {number|undefined}
+ * @api
+ */
+olx.format.WFSWriteGetFeatureOptions.prototype.startIndex;
+
+
+/**
+ * Number of features to retrieve when paging. This is a WFS 2.0 feature
+ * backported to WFS 1.1.0 by some Web Feature Services. Please note that some
+ * Web Feature Services have repurposed `maxfeatures` instead.
+ * @type {number|undefined}
+ * @api
+ */
+olx.format.WFSWriteGetFeatureOptions.prototype.count;
+
+
 /**
  * Extent to use for the BBOX filter.
  * @type {ol.Extent|undefined}