diff --git a/src/ol/render/canvas/canvas.js b/src/ol/render/canvas/canvas.js
index ca71d31e8e..188b2d1a2b 100644
--- a/src/ol/render/canvas/canvas.js
+++ b/src/ol/render/canvas/canvas.js
@@ -20,6 +20,14 @@ ol.render.canvas.FillState;
 ol.render.canvas.StrokeState;
 
 
+/**
+ * @typedef {{font: string,
+ *            textAlign: string,
+ *            textBaseline: string}}
+ */
+ol.render.canvas.TextState;
+
+
 /**
  * @const
  * @type {string}