diff --git a/src/ol/format/gml/gml3format.js b/src/ol/format/gml/gml3format.js
index 94f04feb2d..65a5e9bc0d 100644
--- a/src/ol/format/gml/gml3format.js
+++ b/src/ol/format/gml/gml3format.js
@@ -66,7 +66,7 @@ ol.format.GML3 = function(opt_options) {
    * @type {boolean}
    */
   this.multiSurface_ = options.multiSurface !== undefined ?
-      /** @type {boolean} */ (options.multiSurface) : true;
+      options.multiSurface : true;
 
   /**
    * @inheritDoc
diff --git a/src/ol/interaction/interaction.js b/src/ol/interaction/interaction.js
index 3f7d7c8be0..85d7103926 100644
--- a/src/ol/interaction/interaction.js
+++ b/src/ol/interaction/interaction.js
@@ -225,7 +225,7 @@ ol.interaction.Interaction.zoomWithoutConstraints =
         resolution !== currentResolution &&
         opt_duration && opt_duration > 0) {
       map.beforeRender(ol.animation.zoom({
-        resolution: /** @type {number} */ (currentResolution),
+        resolution: currentResolution,
         duration: opt_duration,
         easing: ol.easing.easeOut
       }));
diff --git a/src/ol/interaction/modifyinteraction.js b/src/ol/interaction/modifyinteraction.js
index de04fdc1d1..e160c3e0f8 100644
--- a/src/ol/interaction/modifyinteraction.js
+++ b/src/ol/interaction/modifyinteraction.js
@@ -824,7 +824,7 @@ ol.interaction.Modify.prototype.insertVertex_ = function(segmentData, vertex) {
   goog.asserts.assert(segment !== undefined, 'segment should be defined');
   rTree.remove(segmentData);
   goog.asserts.assert(index !== undefined, 'index should be defined');
-  this.updateSegmentIndices_(geometry, /** @type {number} */ (index), depth, 1);
+  this.updateSegmentIndices_(geometry, index, depth, 1);
   var newSegmentData = /** @type {ol.interaction.SegmentDataType} */ ({
     segment: [segment[0], vertex],
     feature: feature,
diff --git a/src/ol/layer/heatmaplayer.js b/src/ol/layer/heatmaplayer.js
index 05354da0a8..75152234ce 100644
--- a/src/ol/layer/heatmaplayer.js
+++ b/src/ol/layer/heatmaplayer.js
@@ -80,11 +80,9 @@ ol.layer.Heatmap = function(opt_options) {
   this.setGradient(options.gradient ?
       options.gradient : ol.layer.Heatmap.DEFAULT_GRADIENT);
 
-  this.setBlur(options.blur !== undefined ?
-      /** @type {number} */ (options.blur) : 15);
+  this.setBlur(options.blur !== undefined ? options.blur : 15);
 
-  this.setRadius(options.radius !== undefined ?
-      /** @type {number} */ (options.radius) : 8);
+  this.setRadius(options.radius !== undefined ? options.radius : 8);
 
   goog.events.listen(this, [
     ol.Object.getChangeEventType(ol.layer.HeatmapLayerProperty.BLUR),