diff --git a/src/ol/Overlay.js b/src/ol/Overlay.js
index f8d71f695a..c74d9bdf3e 100644
--- a/src/ol/Overlay.js
+++ b/src/ol/Overlay.js
@@ -436,8 +436,8 @@ class Overlay extends BaseObject {
 
   /**
    * Get the extent of an element relative to the document
-   * @param {HTMLElement|undefined} element The element.
-   * @param {import("./size.js").Size|undefined} size The size of the element.
+   * @param {HTMLElement} element The element.
+   * @param {import("./size.js").Size} size The size of the element.
    * @return {import("./extent.js").Extent} The extent.
    * @protected
    */
diff --git a/src/ol/renderer/webgl/PointsLayer.js b/src/ol/renderer/webgl/PointsLayer.js
index 226b729b0d..d9a5495cc9 100644
--- a/src/ol/renderer/webgl/PointsLayer.js
+++ b/src/ol/renderer/webgl/PointsLayer.js
@@ -109,7 +109,7 @@ class WebGLPointsLayerRenderer extends WebGLLayerRenderer {
 
   /**
    * @param {import("../../layer/Layer.js").default} layer Layer.
-   * @param {Options=} options Options.
+   * @param {Options} options Options.
    */
   constructor(layer, options) {
     const uniforms = options.uniforms || {};
diff --git a/src/ol/webgl/PostProcessingPass.js b/src/ol/webgl/PostProcessingPass.js
index 1405398354..683e600c41 100644
--- a/src/ol/webgl/PostProcessingPass.js
+++ b/src/ol/webgl/PostProcessingPass.js
@@ -101,7 +101,7 @@ const DEFAULT_FRAGMENT_SHADER = `
 class WebGLPostProcessingPass {
 
   /**
-   * @param {Options=} options Options.
+   * @param {Options} options Options.
    */
   constructor(options) {
     this.gl_ = options.webGlContext;