diff --git a/externs/geojson.js b/externs/geojson.js
index db7e1b62e3..0b7c2c74ac 100644
--- a/externs/geojson.js
+++ b/externs/geojson.js
@@ -13,6 +13,12 @@
 var GeoJSONObject = function() {};
 
 
+/**
+ * @type {!Array.<number>|undefined}
+ */
+GeoJSONObject.prototype.bbox;
+
+
 /**
  * @type {string}
  */
@@ -28,11 +34,17 @@ GeoJSONObject.prototype.crs;
 
 /**
  * @constructor
- * @extends {GeoJSONObject}
  */
 var GeoJSONCRS = function() {};
 
 
+/**
+ * CRS type. One of `link` or `name`.
+ * @type {string}
+ */
+GeoJSONCRS.prototype.type;
+
+
 /**
  * TODO: remove GeoJSONCRSCode when http://jira.codehaus.org/browse/GEOS-5996
  * is fixed and widely deployed.
@@ -110,12 +122,6 @@ GeoJSONGeometryCollection.prototype.geometries;
 var GeoJSONFeature = function() {};
 
 
-/**
- * @type {!Array.<number>|undefined}
- */
-GeoJSONFeature.prototype.bbox;
-
-
 /**
  * @type {GeoJSONGeometry}
  */
@@ -148,16 +154,9 @@ var GeoJSONFeatureCollection = function() {};
 GeoJSONFeatureCollection.prototype.features;
 
 
-/**
- * @type {!Array.<number>|undefined}
- */
-GeoJSONFeatureCollection.prototype.bbox;
-
-
 
 /**
  * @constructor
- * @extends {GeoJSONObject}
  */
 var GeoJSONLink = function() {};
 
@@ -166,3 +165,8 @@ var GeoJSONLink = function() {};
  * @type {string}
  */
 GeoJSONLink.prototype.href;
+
+/**
+ * @type {string}
+ */
+GeoJSONLink.prototype.type;
diff --git a/externs/olx.js b/externs/olx.js
index 656a33e25f..ddb1b0cd29 100644
--- a/externs/olx.js
+++ b/externs/olx.js
@@ -3602,7 +3602,7 @@ olx.source.FormatVectorOptions.prototype.projection;
  * @typedef {{attributions: (Array.<ol.Attribution>|undefined),
  *     defaultProjection: ol.proj.ProjectionLike,
  *     logo: (string|olx.LogoOptions|undefined),
- *     object: (GeoJSONObject|undefined),
+ *     object: (GeoJSONFeature|GeoJSONFeatureCollection|undefined),
  *     projection: ol.proj.ProjectionLike,
  *     text: (string|undefined),
  *     url: (string|undefined),
@@ -3637,8 +3637,8 @@ olx.source.GeoJSONOptions.prototype.logo;
 
 
 /**
- * Object.
- * @type {GeoJSONObject|undefined}
+ * GeoJSON feature or feature collection.
+ * @type {GeoJSONFeature|GeoJSONFeatureCollection|undefined}
  * @api
  */
 olx.source.GeoJSONOptions.prototype.object;
diff --git a/src/ol/format/geojsonformat.js b/src/ol/format/geojsonformat.js
index 66fe0b0aff..c29a15b7f2 100644
--- a/src/ol/format/geojsonformat.js
+++ b/src/ol/format/geojsonformat.js
@@ -64,7 +64,7 @@ ol.format.GeoJSON.EXTENSIONS_ = ['.geojson'];
 
 
 /**
- * @param {GeoJSONObject} object Object.
+ * @param {GeoJSONGeometry|GeoJSONGeometryCollection} object Object.
  * @param {olx.format.ReadOptions=} opt_options Read options.
  * @private
  * @return {ol.geom.Geometry} Geometry.
@@ -92,7 +92,7 @@ ol.format.GeoJSON.readGeometryCollectionGeometry_ = function(
   goog.asserts.assert(object.type == 'GeometryCollection');
   var geometries = goog.array.map(object.geometries,
       /**
-       * @param {GeoJSONObject} geometry Geometry.
+       * @param {GeoJSONGeometry} geometry Geometry.
        * @return {ol.geom.Geometry} geometry Geometry.
        */
       function(geometry) {