diff --git a/src/ol/layer/BaseVector.js b/src/ol/layer/BaseVector.js
index b612b5f762..441ea30742 100644
--- a/src/ol/layer/BaseVector.js
+++ b/src/ol/layer/BaseVector.js
@@ -72,8 +72,7 @@ class BaseVectorLayer extends Layer {
    * @param {Options=} opt_options Options.
    */
   constructor(opt_options) {
-    const options = opt_options ?
-      opt_options : /** @type {Options} */ ({});
+    const options = opt_options ? opt_options : {};
 
     const baseOptions = assign({}, options);
 
diff --git a/src/ol/layer/VectorImage.js b/src/ol/layer/VectorImage.js
index 1b948ce832..980385da57 100644
--- a/src/ol/layer/VectorImage.js
+++ b/src/ol/layer/VectorImage.js
@@ -60,7 +60,7 @@ class VectorImageLayer extends BaseVectorLayer {
    * @param {Options=} opt_options Options.
    */
   constructor(opt_options) {
-    const options = opt_options ? opt_options : /** @type {Options} */ ({});
+    const options = opt_options ? opt_options : {};
 
     const baseOptions = assign({}, options);
     delete baseOptions.imageRatio;
diff --git a/src/ol/source/ImageArcGISRest.js b/src/ol/source/ImageArcGISRest.js
index d051fca8aa..63859a415b 100644
--- a/src/ol/source/ImageArcGISRest.js
+++ b/src/ol/source/ImageArcGISRest.js
@@ -56,7 +56,7 @@ class ImageArcGISRest extends ImageSource {
    */
   constructor(opt_options) {
 
-    const options = opt_options || /** @type {Options} */ ({});
+    const options = opt_options ? opt_options : {};
 
     super({
       attributions: options.attributions,
diff --git a/src/ol/source/ImageCanvas.js b/src/ol/source/ImageCanvas.js
index f98a15d496..2137d7aa6a 100644
--- a/src/ol/source/ImageCanvas.js
+++ b/src/ol/source/ImageCanvas.js
@@ -53,7 +53,7 @@ class ImageCanvasSource extends ImageSource {
    */
   constructor(opt_options) {
 
-    const options = opt_options || /** @type {Options} */ ({});
+    const options = opt_options ? opt_options : {};
 
     super({
       attributions: options.attributions,
diff --git a/src/ol/source/ImageWMS.js b/src/ol/source/ImageWMS.js
index 6126421787..2dbf65067c 100644
--- a/src/ol/source/ImageWMS.js
+++ b/src/ol/source/ImageWMS.js
@@ -63,7 +63,7 @@ class ImageWMS extends ImageSource {
    */
   constructor(opt_options) {
 
-    const options = opt_options || /** @type {Options} */ ({});
+    const options = opt_options ? opt_options : {};
 
     super({
       attributions: options.attributions,
diff --git a/src/ol/source/TileArcGISRest.js b/src/ol/source/TileArcGISRest.js
index d8ccd391d4..93ef8363b8 100644
--- a/src/ol/source/TileArcGISRest.js
+++ b/src/ol/source/TileArcGISRest.js
@@ -64,7 +64,7 @@ class TileArcGISRest extends TileImage {
    */
   constructor(opt_options) {
 
-    const options = opt_options || /** @type {Options} */ ({});
+    const options = opt_options ? opt_options : {};
 
     super({
       attributions: options.attributions,
diff --git a/src/ol/source/TileWMS.js b/src/ol/source/TileWMS.js
index 7e98d56a63..0e449d4fab 100644
--- a/src/ol/source/TileWMS.js
+++ b/src/ol/source/TileWMS.js
@@ -81,7 +81,7 @@ class TileWMS extends TileImage {
    */
   constructor(opt_options) {
 
-    const options = opt_options || /** @type {Options} */ ({});
+    const options = opt_options ? opt_options : {};
 
     const params = options.params || {};
 
diff --git a/src/ol/style/Circle.js b/src/ol/style/Circle.js
index 998e8cb739..659c71d305 100644
--- a/src/ol/style/Circle.js
+++ b/src/ol/style/Circle.js
@@ -24,7 +24,7 @@ class CircleStyle extends RegularShape {
    */
   constructor(opt_options) {
 
-    const options = opt_options || /** @type {Options} */ ({});
+    const options = opt_options ? opt_options : {};
 
     super({
       points: Infinity,