diff --git a/externs/oli.js b/externs/oli.js
index 2d3b06348e..c6c2204bd2 100644
--- a/externs/oli.js
+++ b/externs/oli.js
@@ -104,7 +104,7 @@ oli.FrameState.prototype.time;
 oli.FrameState.prototype.usedTiles;
 
 
-/** @type {ol.View2DState} */
+/** @type {oli.View2DState} */
 oli.FrameState.prototype.view2DState;
 
 
@@ -142,6 +142,27 @@ oli.MapBrowserEvent.prototype.pixel;
 
 
 
+/** @interface */
+oli.View2DState;
+
+
+/** @type {ol.Coordinate} */
+oli.View2DState.prototype.center;
+
+
+/** @type {ol.proj.Projection} */
+oli.View2DState.prototype.projection;
+
+
+/** @type {number} */
+oli.View2DState.prototype.resolution;
+
+
+/** @type {number} */
+oli.View2DState.prototype.rotation;
+
+
+
 /**
  * @interface
  */