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 e0b69e0e8736..177633b00847 100644
--- a/spring-web/src/main/java/org/springframework/http/ResponseCookie.java
+++ b/spring-web/src/main/java/org/springframework/http/ResponseCookie.java
@@ -171,7 +171,7 @@ public String toString() {
 		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) {