diff --git a/src/panels/lovelace/hui-root.ts b/src/panels/lovelace/hui-root.ts
index 162d59acca..39e918de00 100644
--- a/src/panels/lovelace/hui-root.ts
+++ b/src/panels/lovelace/hui-root.ts
@@ -441,7 +441,7 @@ class HUIRoot extends hassLocalizeLitMixin(LitElement) {
     this._selectView("unused");
   }
 
-  private _deselect(ev) {
+  private _deselect(ev): void {
     ev.target.selected = null;
   }