diff --git a/src/java.base/share/classes/jdk/internal/module/SystemModuleFinders.java b/src/java.base/share/classes/jdk/internal/module/SystemModuleFinders.java
index 09ad3dc456d..39f433d4041 100644
--- a/src/java.base/share/classes/jdk/internal/module/SystemModuleFinders.java
+++ b/src/java.base/share/classes/jdk/internal/module/SystemModuleFinders.java
@@ -430,6 +430,7 @@ public final class SystemModuleFinders {
 
         @Override
         public Optional<URI> find(String name) throws IOException {
+            Objects.requireNonNull(name);
             String resourcePath = "/" + module + "/" + name;
             if (containsResource(resourcePath)) {
                 URI u = JNUA.create("jrt", resourcePath);