1 files changed, 1 insertions, 1 deletions
diff --git a/toolkit/content/widgets/moz-button-group/moz-button-group.mjs b/toolkit/content/widgets/moz-button-group/moz-button-group.mjs
index 0706f94762..8bf553c23d 100644
--- a/toolkit/content/widgets/moz-button-group/moz-button-group.mjs
+++ b/toolkit/content/widgets/moz-button-group/moz-button-group.mjs
@@ -44,7 +44,7 @@ export default class MozButtonGroup extends MozLitElement {
     }
   }
 
-  onSlotchange(e) {
+  onSlotchange() {
     for (let child of this.defaultSlotEl.assignedNodes()) {
       if (!(child instanceof Element)) {
         // Text nodes won't support classList or getAttribute.