diff --git a/src/display/api.js b/src/display/api.js
index 20c78009e..f5b0a9f75 100644
--- a/src/display/api.js
+++ b/src/display/api.js
@@ -1169,7 +1169,8 @@ class PDFDocumentProxy {
  * Page render parameters.
  *
  * @typedef {Object} RenderParameters
- * @property {Object} canvasContext - A 2D context of a DOM Canvas object.
+ * @property {CanvasRenderingContext2D} canvasContext - A 2D context of a DOM
+ *   Canvas object.
  * @property {PageViewport} viewport - Rendering viewport obtained by calling
  *   the `PDFPageProxy.getViewport` method.
  * @property {string} [intent] - Rendering intent, can be 'display', 'print',
diff --git a/web/pdf_find_controller.js b/web/pdf_find_controller.js
index ecc52295f..cbb2b4f6b 100644
--- a/web/pdf_find_controller.js
+++ b/web/pdf_find_controller.js
@@ -369,7 +369,7 @@ function getOriginalIndex(diffs, pos, len) {
  * @typedef {Object} PDFFindControllerOptions
  * @property {IPDFLinkService} linkService - The navigation/linking service.
  * @property {EventBus} eventBus - The application event bus.
- * @property {boolean} updateMatchesCountOnProgress - True if the matches
+ * @property {boolean} [updateMatchesCountOnProgress] - True if the matches
  *   count must be updated on progress or only when the last page is reached.
  *   The default value is `true`.
  */