diff --git a/src/ol/deviceorientation.js b/src/ol/deviceorientation.js
index c10584091a..a9660d1119 100644
--- a/src/ol/deviceorientation.js
+++ b/src/ol/deviceorientation.js
@@ -122,7 +122,9 @@ ol.DeviceOrientation.prototype.orientationChange_ = function(browserEvent) {
     // event.absolute is undefined in iOS.
     if (goog.isBoolean(event.absolute) && event.absolute) {
       this.set(ol.DeviceOrientationProperty.HEADING, alpha);
-    } else if (goog.isDefAndNotNull(event.webkitCompassHeading)) {
+    } else if (goog.isDefAndNotNull(event.webkitCompassHeading) &&
+               goog.isDefAndNotNull(event.webkitCompassAccuracy) &&
+               event.webkitCompassAccuracy != -1) {
       var heading = goog.math.toRadians(event.webkitCompassHeading);
       this.set(ol.DeviceOrientationProperty.HEADING, heading);
     }