diff --git a/examples/animation.js b/examples/animation.js
index a3cf25739e..7ee443b71c 100644
--- a/examples/animation.js
+++ b/examples/animation.js
@@ -55,7 +55,7 @@ var panToLondon = document.getElementById('pan-to-london');
 panToLondon.addEventListener('click', function() {
   var pan = ol.animation.pan({
     duration: 2000,
-    source: view.getCenter()
+    source: /** @type {ol.Coordinate} */ (view.getCenter())
   });
   map.beforeRender(pan);
   view.setCenter(london);
@@ -66,7 +66,7 @@ elasticToMoscow.addEventListener('click', function() {
   var pan = ol.animation.pan({
     duration: 2000,
     easing: ol.easing.elastic,
-    source: view.getCenter()
+    source: /** @type {ol.Coordinate} */ (view.getCenter())
   });
   map.beforeRender(pan);
   view.setCenter(moscow);
@@ -77,7 +77,7 @@ bounceToIstanbul.addEventListener('click', function() {
   var pan = ol.animation.pan({
     duration: 2000,
     easing: ol.easing.bounce,
-    source: view.getCenter()
+    source: /** @type {ol.Coordinate} */ (view.getCenter())
   });
   map.beforeRender(pan);
   view.setCenter(istanbul);
@@ -89,7 +89,7 @@ spinToRome.addEventListener('click', function() {
   var start = +new Date();
   var pan = ol.animation.pan({
     duration: duration,
-    source: view.getCenter(),
+    source: /** @type {ol.Coordinate} */ (view.getCenter()),
     start: start
   });
   var rotate = ol.animation.rotate({
@@ -107,7 +107,7 @@ flyToBern.addEventListener('click', function() {
   var start = +new Date();
   var pan = ol.animation.pan({
     duration: duration,
-    source: view.getCenter(),
+    source: /** @type {ol.Coordinate} */ (view.getCenter()),
     start: start
   });
   var bounce = ol.animation.bounce({
@@ -125,7 +125,7 @@ spiralToMadrid.addEventListener('click', function() {
   var start = +new Date();
   var pan = ol.animation.pan({
     duration: duration,
-    source: view.getCenter(),
+    source: /** @type {ol.Coordinate} */ (view.getCenter()),
     start: start
   });
   var bounce = ol.animation.bounce({
diff --git a/examples/mouse-position.js b/examples/mouse-position.js
index 998d37edd5..d14471767f 100644
--- a/examples/mouse-position.js
+++ b/examples/mouse-position.js
@@ -41,6 +41,7 @@ projectionSelect.on('change:value', function() {
 
 var precisionInput = new ol.dom.Input(document.getElementById('precision'));
 precisionInput.on('change:value', function() {
-  var format = ol.coordinate.createStringXY(precisionInput.getValue());
+  var precision = /** @type {number} */ (precisionInput.getValueAsNumber());
+  var format = ol.coordinate.createStringXY(precision);
   mousePositionControl.setCoordinateFormat(format);
 });
diff --git a/examples/wmts-ign.js b/examples/wmts-ign.js
index 1136e1adca..2879a1f30a 100644
--- a/examples/wmts-ign.js
+++ b/examples/wmts-ign.js
@@ -75,9 +75,10 @@ xhr.onload = function() {
     }
 
     var view = new ol.View2D();
-    view.fitExtent([
-      257596.65942095537, 6250898.984085131,
-      262082.55751844167, 6251854.446938695], map.getSize());
+    view.fitExtent(
+        [257596.65942095537, 6250898.984085131,
+         262082.55751844167, 6251854.446938695],
+        /** @type {ol.Size} */ (map.getSize()));
     map.setView(view);
   }
 };