diff --git a/jetty-ee10/jetty-ee10-webapp/src/main/java/org/eclipse/jetty/ee10/webapp/MetaData.java b/jetty-ee10/jetty-ee10-webapp/src/main/java/org/eclipse/jetty/ee10/webapp/MetaData.java
index 58e6a0d968f..fe5d77c9f07 100644
--- a/jetty-ee10/jetty-ee10-webapp/src/main/java/org/eclipse/jetty/ee10/webapp/MetaData.java
+++ b/jetty-ee10/jetty-ee10-webapp/src/main/java/org/eclipse/jetty/ee10/webapp/MetaData.java
@@ -718,6 +718,7 @@ public class MetaData
 
     public void addContainerResource(Resource jar)
     {
+        Objects.requireNonNull(jar);
         _orderedContainerResources.add(jar);
     }