diff --git a/src/ol/ImageCanvas.js b/src/ol/ImageCanvas.js
index 792cccbdec..bd26136d5b 100644
--- a/src/ol/ImageCanvas.js
+++ b/src/ol/ImageCanvas.js
@@ -11,7 +11,7 @@ import ImageState from './ImageState.js';
  * If any error occurs during drawing, the "done" callback should be called with
  * that error.
  *
- * @typedef {function(function(Error))} Loader
+ * @typedef {function(function(Error=))} Loader
  */
 
 
@@ -62,7 +62,7 @@ class ImageCanvas extends ImageBase {
 
   /**
    * Handle async drawing complete.
-   * @param {Error} err Any error during drawing.
+   * @param {Error=} err Any error during drawing.
    * @private
    */
   handleLoad_(err) {
diff --git a/src/ol/renderer/Map.js b/src/ol/renderer/Map.js
index 786565c1d5..068a11d3d7 100644
--- a/src/ol/renderer/Map.js
+++ b/src/ol/renderer/Map.js
@@ -40,7 +40,7 @@ class MapRenderer extends Disposable {
 
     /**
      * @private
-     * @type {Array<import("./Layer.js").default>}
+     * @type {Array<typeof import("./Layer.js").default>}
      */
     this.layerRendererConstructors_ = [];
 
@@ -55,7 +55,7 @@ class MapRenderer extends Disposable {
 
   /**
    * Register layer renderer constructors.
-   * @param {Array<import("./Layer.js").default>} constructors Layer renderers.
+   * @param {Array<typeof import("./Layer.js").default>} constructors Layer renderers.
    */
   registerLayerRenderers(constructors) {
     this.layerRendererConstructors_.push.apply(this.layerRendererConstructors_, constructors);
diff --git a/src/ol/renderer/canvas/ImageLayer.js b/src/ol/renderer/canvas/ImageLayer.js
index d9134a4197..20990b761b 100644
--- a/src/ol/renderer/canvas/ImageLayer.js
+++ b/src/ol/renderer/canvas/ImageLayer.js
@@ -54,7 +54,7 @@ class CanvasImageLayerRenderer extends IntermediateCanvasRenderer {
       for (let i = 0, ii = layerRendererConstructors.length; i < ii; ++i) {
         const ctor = layerRendererConstructors[i];
         if (ctor !== CanvasImageLayerRenderer && ctor['handles'](imageLayer)) {
-          this.vectorRenderer_ = new ctor(imageLayer);
+          this.vectorRenderer_ = /** @type {import("./VectorLayer.js").default} */ (new ctor(imageLayer));
           break;
         }
       }
@@ -99,7 +99,7 @@ class CanvasImageLayerRenderer extends IntermediateCanvasRenderer {
 
     let image;
     const imageLayer = /** @type {import("../../layer/Image.js").default} */ (this.getLayer());
-    const imageSource = imageLayer.getSource();
+    const imageSource = /** @type {import("../../source/Image.js").default} */ (imageLayer.getSource());
 
     const hints = frameState.viewHints;
 
diff --git a/src/ol/renderer/canvas/Map.js b/src/ol/renderer/canvas/Map.js
index 5a351d41ef..5b54f25a06 100644
--- a/src/ol/renderer/canvas/Map.js
+++ b/src/ol/renderer/canvas/Map.js
@@ -15,7 +15,7 @@ import SourceState from '../../source/State.js';
 
 
 /**
- * @type {Array<import("../Layer.js").default>}
+ * @type {Array<typeof import("../Layer.js").default>}
  */
 export const layerRendererConstructors = [];