diff --git a/externs/olx.js b/externs/olx.js
index 9d4134119e..b009fdaaee 100644
--- a/externs/olx.js
+++ b/externs/olx.js
@@ -2014,7 +2014,8 @@ olx.format.WFSOptions.prototype.schemaLocation;
  *     startIndex: (number|undefined),
  *     count: (number|undefined),
  *     bbox: (ol.Extent|undefined),
- *     filter: (ol.format.ogc.filter.Filter|undefined)}}
+ *     filter: (ol.format.ogc.filter.Filter|undefined),
+ *     resultType: (string|undefined)}}
  */
 olx.format.WFSWriteGetFeatureOptions;
 
@@ -2127,6 +2128,15 @@ olx.format.WFSWriteGetFeatureOptions.prototype.bbox;
 olx.format.WFSWriteGetFeatureOptions.prototype.filter;
 
 
+/**
+ * Indicates what response should be returned, E.g. `hits` only includes the
+ * `numberOfFeatures` attribute in the response and no features.
+ * @type {string|undefined}
+ * @api
+ */
+olx.format.WFSWriteGetFeatureOptions.prototype.resultType;
+
+
 /**
  * @typedef {{featureNS: string,
  *     featurePrefix: string,