diff --git a/src/lru.js b/src/lru.js
index 8ed976d..94917fe 100644
--- a/src/lru.js
+++ b/src/lru.js
@@ -76,8 +76,8 @@ export class LRU {
 	 * @since 1.0.0
 	 */
 	delete (key) {
-		if (this.has(key)) {
-			const item = this.items[key];
+		const item = this.items[key];
+		if (item !== undefined) {
 
 			delete this.items[key];
 			this.size--;
@@ -176,9 +176,9 @@ export class LRU {
 	 */
 	expiresAt (key) {
 		let result;
-
-		if (this.has(key)) {
-			result = this.items[key].expiry;
+		const item = this.items[key];
+		if (item !== undefined) {
+			result = item.expiry;
 		}
 
 		return result;