diff --git a/externs/olx.js b/externs/olx.js
index 73a5109345..349b1f8552 100644
--- a/externs/olx.js
+++ b/externs/olx.js
@@ -5,95 +5,6 @@
 let olx;
 
 
-/**
- * @typedef {{featureNS: string,
- *     featurePrefix: string,
- *     featureType: string,
- *     srsName: (string|undefined),
- *     handle: (string|undefined),
- *     hasZ: (boolean|undefined),
- *     nativeElements: Array.<Object>,
- *     gmlOptions: (module:ol/format/GMLBase~Options|undefined),
- *     version: (string|undefined)}}
- */
-olx.format.WFSWriteTransactionOptions;
-
-
-/**
- * The namespace URI used for features.
- * @type {string}
- * @api
- */
-olx.format.WFSWriteTransactionOptions.prototype.featureNS;
-
-
-/**
- * The prefix for the feature namespace.
- * @type {string}
- * @api
- */
-olx.format.WFSWriteTransactionOptions.prototype.featurePrefix;
-
-
-/**
- * The feature type name.
- * @type {string}
- * @api
- */
-olx.format.WFSWriteTransactionOptions.prototype.featureType;
-
-
-/**
- * SRS name. No srsName attribute will be set on geometries when this is not
- * provided.
- * @type {string|undefined}
- * @api
- */
-olx.format.WFSWriteTransactionOptions.prototype.srsName;
-
-
-/**
- * Handle.
- * @type {string|undefined}
- * @api
- */
-olx.format.WFSWriteTransactionOptions.prototype.handle;
-
-
-/**
- * Must be set to true if the transaction is for a 3D layer. This will allow
- * the Z coordinate to be included in the transaction.
- * @type {boolean|undefined}
- * @api
- */
-olx.format.WFSWriteTransactionOptions.prototype.hasZ;
-
-
-/**
- * Native elements. Currently not supported.
- * @type {Array.<Object>}
- * @api
- */
-olx.format.WFSWriteTransactionOptions.prototype.nativeElements;
-
-
-/**
- * GML options for the WFS transaction writer.
- * @type {module:ol/format/GMLBase~Options|undefined}
- * @api
- */
-olx.format.WFSWriteTransactionOptions.prototype.gmlOptions;
-
-
-/**
- * WFS version to use for the transaction. Can be either `1.0.0` or `1.1.0`.
- * Default is `1.1.0`.
- * @type {string|undefined}
- * @api
- */
-olx.format.WFSWriteTransactionOptions.prototype.version;
-
-
 /**
  * @typedef {{splitCollection: (boolean|undefined)}}
  */
diff --git a/externs/xol.js b/externs/xol.js
index e5bc5a0d41..29306696dc 100644
--- a/externs/xol.js
+++ b/externs/xol.js
@@ -1,21 +1,4 @@
 
-/**
- * @typedef {Object} format_WFSWriteTransactionOptions
- * @property {string} featureNS The namespace URI used for features.
- * @property {string} featurePrefix The prefix for the feature namespace.
- * @property {string} featureType The feature type name.
- * @property {string|undefined} srsName SRS name. No srsName attribute will be set on geometries when this is not
- * provided.
- * @property {string|undefined} handle Handle.
- * @property {boolean|undefined} hasZ Must be set to true if the transaction is for a 3D layer. This will allow
- * the Z coordinate to be included in the transaction.
- * @property {Array.<Object>} nativeElements Native elements. Currently not supported.
- * @property {module:ol/format/GMLBase~Options|undefined} gmlOptions GML options for the WFS transaction writer.
- * @property {string|undefined} version WFS version to use for the transaction. Can be either `1.0.0` or `1.1.0`.
- * Default is `1.1.0`.
- */
-
-
 /**
  * @typedef {Object} format_WKTOptions
  * @property {boolean|undefined} splitCollection Whether to split GeometryCollections into
diff --git a/src/ol/format/WFS.js b/src/ol/format/WFS.js
index 71a98b1e01..295e982db8 100644
--- a/src/ol/format/WFS.js
+++ b/src/ol/format/WFS.js
@@ -55,6 +55,24 @@ import {createElementNS, isDocument, isNode, makeArrayPusher, makeChildAppender,
  */
 
 
+/**
+ * @typedef {Object} WriteTransactionOptions
+ * @property {string} featureNS The namespace URI used for features.
+ * @property {string} featurePrefix The prefix for the feature namespace.
+ * @property {string} featureType The feature type name.
+ * @property {string|undefined} srsName SRS name. No srsName attribute will be set on
+ * geometries when this is not provided.
+ * @property {string|undefined} handle Handle.
+ * @property {boolean|undefined} hasZ Must be set to true if the transaction is for
+ * a 3D layer. This will allow the Z coordinate to be included in the transaction.
+ * @property {Array.<Object>} nativeElements Native elements. Currently not supported.
+ * @property {module:ol/format/GMLBase~Options|undefined} gmlOptions GML options for
+ * the WFS transaction writer.
+ * @property {string|undefined} version WFS version to use for the transaction. Can be
+ * either `1.0.0` or `1.1.0`. Default is `1.1.0`.
+ */
+
+
 /**
  * @type {string}
  */
@@ -982,7 +1000,7 @@ WFS.prototype.writeGetFeature = function(options) {
  * @param {Array.<ol.Feature>} inserts The features to insert.
  * @param {Array.<ol.Feature>} updates The features to update.
  * @param {Array.<ol.Feature>} deletes The features to delete.
- * @param {olx.format.WFSWriteTransactionOptions} options Write options.
+ * @param {module:ol/format/WFS~WriteTransactionOptions} options Write options.
  * @return {Node} Result.
  * @api
  */