diff --git a/components/selection/selection-mixin.js b/components/selection/selection-mixin.js
index fd626cfbda4..f36bf1ee943 100644
--- a/components/selection/selection-mixin.js
+++ b/components/selection/selection-mixin.js
@@ -16,21 +16,21 @@ export class SelectionInfo {
 		if (!allEnabledSelected) allEnabledSelected = false;
 		if (!keys) keys = [];
 		if (!state) state = SelectionInfo.states.none;
-		this._allEnabledSelected = allEnabledSelected;
-		this._keys = keys;
-		this._state = state;
+		this.#allEnabledSelected = allEnabledSelected;
+		this.#keys = keys;
+		this.#state = state;
 	}
 
 	get allEnabledSelected() {
-		return this._allEnabledSelected;
+		return this.#allEnabledSelected;
 	}
 
 	get keys() {
-		return this._keys;
+		return this.#keys;
 	}
 
 	get state() {
-		return this._state;
+		return this.#state;
 	}
 
 	static get states() {
@@ -42,6 +42,10 @@ export class SelectionInfo {
 		};
 	}
 
+	#allEnabledSelected;
+	#keys;
+	#state;
+
 }
 
 export const SelectionMixin = superclass => class extends RtlMixin(CollectionMixin(superclass)) {