diff --git a/src/ol/interaction/selectinteraction.js b/src/ol/interaction/selectinteraction.js
index 6c4b73d8e4..12db606644 100644
--- a/src/ol/interaction/selectinteraction.js
+++ b/src/ol/interaction/selectinteraction.js
@@ -221,8 +221,8 @@ ol.interaction.Select.handleEvent = function(mapBrowserEvent) {
   var set = !add && !remove && !toggle;
   var map = mapBrowserEvent.map;
   var features = this.featureOverlay_.getSource().getFeaturesCollection();
-  var /** @type {Array.<ol.Feature>} */ deselected = [];
-  var /** @type {Array.<ol.Feature>} */ selected = [];
+  var /** @type {!Array.<ol.Feature>} */ deselected = [];
+  var /** @type {!Array.<ol.Feature>} */ selected = [];
   var change = false;
   if (set) {
     // Replace the currently selected feature(s) with the feature(s) at the