diff --git a/src/ol/geolocation.js b/src/ol/geolocation.js
index de6b291290..eab663b2fa 100644
--- a/src/ol/geolocation.js
+++ b/src/ol/geolocation.js
@@ -77,6 +77,12 @@ ol.Geolocation.prototype.handleProjectionChanged_ = function() {
 };
 
 
+/**
+ * @type {boolean} Is supported.
+ */
+ol.Geolocation.isSupported = 'geolocation' in navigator;
+
+
 /**
  * @private
  * @param {GeolocationPosition} position position event.