diff --git a/jetty-ee10/jetty-ee10-servlet/src/main/java/org/eclipse/jetty/ee10/servlet/ServletApiResponse.java b/jetty-ee10/jetty-ee10-servlet/src/main/java/org/eclipse/jetty/ee10/servlet/ServletApiResponse.java
index ce35fd536a5..6baaf8e7b99 100644
--- a/jetty-ee10/jetty-ee10-servlet/src/main/java/org/eclipse/jetty/ee10/servlet/ServletApiResponse.java
+++ b/jetty-ee10/jetty-ee10-servlet/src/main/java/org/eclipse/jetty/ee10/servlet/ServletApiResponse.java
@@ -596,7 +596,8 @@ public class ServletApiResponse implements HttpServletResponse
         @Override
         public boolean isPartitioned()
         {
-            return Boolean.parseBoolean(getAttributes().get(HttpCookie.PARTITIONED_ATTRIBUTE));
+            String value = getAttributes().get(HttpCookie.PARTITIONED_ATTRIBUTE);
+            return value != null && !StringUtil.asciiEqualsIgnoreCase("false", value);
         }
 
         @Override
diff --git a/jetty-ee11/jetty-ee11-servlet/src/main/java/org/eclipse/jetty/ee11/servlet/ServletApiResponse.java b/jetty-ee11/jetty-ee11-servlet/src/main/java/org/eclipse/jetty/ee11/servlet/ServletApiResponse.java
index c5668fe3095..eee3c612f2d 100644
--- a/jetty-ee11/jetty-ee11-servlet/src/main/java/org/eclipse/jetty/ee11/servlet/ServletApiResponse.java
+++ b/jetty-ee11/jetty-ee11-servlet/src/main/java/org/eclipse/jetty/ee11/servlet/ServletApiResponse.java
@@ -633,7 +633,8 @@ public class ServletApiResponse implements HttpServletResponse
         @Override
         public boolean isPartitioned()
         {
-            return Boolean.parseBoolean(getAttributes().get(HttpCookie.PARTITIONED_ATTRIBUTE));
+            String value = getAttributes().get(HttpCookie.PARTITIONED_ATTRIBUTE);
+            return value != null && !StringUtil.asciiEqualsIgnoreCase("false", value);
         }
 
         @Override