diff --git a/externs/olx.js b/externs/olx.js
index de03a496ea..0e88c731c8 100644
--- a/externs/olx.js
+++ b/externs/olx.js
@@ -168,8 +168,8 @@ olx.MapOptions.prototype.layers;
 
 
 /**
- * Show ol3 logo. Default is `true`.
- * @type {boolean|undefined}
+ * The map logo. Default is `true`, showing ol3’s logo.
+ * @type {boolean|string|Object|undefined}
  */
 olx.MapOptions.prototype.logo;