diff --git a/src/ol/interaction/DoubleClickZoom.js b/src/ol/interaction/DoubleClickZoom.js
index 2e75ab4062..32fd5bc897 100644
--- a/src/ol/interaction/DoubleClickZoom.js
+++ b/src/ol/interaction/DoubleClickZoom.js
@@ -55,8 +55,8 @@ class DoubleClickZoom extends Interaction {
  */
 function handleEvent(mapBrowserEvent) {
   let stopEvent = false;
-  const browserEvent = mapBrowserEvent.originalEvent;
   if (mapBrowserEvent.type == MapBrowserEventType.DBLCLICK) {
+    const browserEvent = /** @type {MouseEvent} */ (mapBrowserEvent.originalEvent);
     const map = mapBrowserEvent.map;
     const anchor = mapBrowserEvent.coordinate;
     const delta = browserEvent.shiftKey ? -this.delta_ : this.delta_;
diff --git a/src/ol/interaction/KeyboardPan.js b/src/ol/interaction/KeyboardPan.js
index 6aac23ee90..1a89c7abdd 100644
--- a/src/ol/interaction/KeyboardPan.js
+++ b/src/ol/interaction/KeyboardPan.js
@@ -92,7 +92,7 @@ class KeyboardPan extends Interaction {
 function handleEvent(mapBrowserEvent) {
   let stopEvent = false;
   if (mapBrowserEvent.type == EventType.KEYDOWN) {
-    const keyEvent = mapBrowserEvent.originalEvent;
+    const keyEvent = /** @type {KeyboardEvent} */ (mapBrowserEvent.originalEvent);
     const keyCode = keyEvent.keyCode;
     if (this.condition_(mapBrowserEvent) &&
         (keyCode == KeyCode.DOWN ||
diff --git a/src/ol/interaction/KeyboardZoom.js b/src/ol/interaction/KeyboardZoom.js
index 4053433564..61f212111f 100644
--- a/src/ol/interaction/KeyboardZoom.js
+++ b/src/ol/interaction/KeyboardZoom.js
@@ -77,7 +77,7 @@ function handleEvent(mapBrowserEvent) {
   let stopEvent = false;
   if (mapBrowserEvent.type == EventType.KEYDOWN ||
       mapBrowserEvent.type == EventType.KEYPRESS) {
-    const keyEvent = mapBrowserEvent.originalEvent;
+    const keyEvent = /** @type {KeyboardEvent} */ (mapBrowserEvent.originalEvent);
     const charCode = keyEvent.charCode;
     if (this.condition_(mapBrowserEvent) &&
         (charCode == '+'.charCodeAt(0) || charCode == '-'.charCodeAt(0))) {