diff --git a/externs/olx.js b/externs/olx.js
index 34f6eb5605..b7ae6e73ea 100644
--- a/externs/olx.js
+++ b/externs/olx.js
@@ -91,7 +91,7 @@ olx.GeolocationOptions.prototype.trackingOptions;
 
 
 /**
- * Projection.
+ * The projection the position is reported in.
  * @type {ol.proj.ProjectionLike}
  * @api stable
  */