diff --git a/core/src/main/java/org/elasticsearch/bootstrap/JarHell.java b/core/src/main/java/org/elasticsearch/bootstrap/JarHell.java
index c5346bf243d90..1959e5e81394b 100644
--- a/core/src/main/java/org/elasticsearch/bootstrap/JarHell.java
+++ b/core/src/main/java/org/elasticsearch/bootstrap/JarHell.java
@@ -140,7 +140,7 @@ static Set<URL> parseClassPath(String classPath) {
                 URL url = PathUtils.get(element).toUri().toURL();
                 if (urlElements.add(url) == false) {
                     throw new IllegalStateException("jar hell!" + System.lineSeparator() +
-                        "duplicate jar on classpath: " + classPath);
+                        "duplicate jar [" + element + "] on classpath: " + classPath);
                 }
             } catch (MalformedURLException e) {
                 // should not happen, as we use the filesystem API