diff --git a/spring-web/src/main/java/org/springframework/http/ResponseCookie.java b/spring-web/src/main/java/org/springframework/http/ResponseCookie.java
index e0b69e0e87..cbe65d1b89 100644
--- a/spring-web/src/main/java/org/springframework/http/ResponseCookie.java
+++ b/spring-web/src/main/java/org/springframework/http/ResponseCookie.java
@@ -1,5 +1,5 @@
 /*
- * Copyright 2002-2023 the original author or authors.
+ * Copyright 2002-2024 the original author or authors.
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
  * you may not use this file except in compliance with the License.
@@ -171,7 +171,7 @@ public final class ResponseCookie extends HttpCookie {
 		if (!this.maxAge.isNegative()) {
 			sb.append("; Max-Age=").append(this.maxAge.getSeconds());
 			sb.append("; Expires=");
-			long millis = this.maxAge.getSeconds() > 0 ? System.currentTimeMillis() + this.maxAge.toMillis() : 0;
+			long millis = (this.maxAge.getSeconds() > 0 ? System.currentTimeMillis() + this.maxAge.toMillis() : 0);
 			sb.append(HttpHeaders.formatDate(millis));
 		}
 		if (this.secure) {