diff --git a/CHANGELOG.md b/CHANGELOG.md
index d3569c5ea32e..ab181540233c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -3,6 +3,7 @@
 **Bug fixes**
 
 - Fixed spacing of `EuiFormErrorText` to match `EuiFormHelpText` ([#2354](https://github.com/elastic/eui/pull/2354))
+- Fixed bug in `EuiPopover` where Array.prototype.slice() may have been called on 'undefined' ([#2369](https://github.com/elastic/eui/pull/2369))
 
 ## [`14.2.0`](https://github.com/elastic/eui/tree/v14.2.0)
 
diff --git a/src/components/popover/popover.tsx b/src/components/popover/popover.tsx
index 2f41b58be030..d3b9cc382709 100644
--- a/src/components/popover/popover.tsx
+++ b/src/components/popover/popover.tsx
@@ -358,7 +358,7 @@ export class EuiPopover extends Component<Props, State> {
 
       // for each child element of `this.panel`, find any transition duration we should wait for before stabilizing
       const { durationMatch, delayMatch } = Array.prototype.slice
-        .call(this.panel ? this.panel.children : undefined)
+        .call(this.panel ? this.panel.children : [])
         .reduce(
           ({ durationMatch, delayMatch }, element) => {
             const transitionTimings = getTransitionTimings(element);