diff --git a/src/main/java/perfix/Agent.java b/src/main/java/perfix/Agent.java
index 0c7b6ea..a5c51a7 100644
--- a/src/main/java/perfix/Agent.java
+++ b/src/main/java/perfix/Agent.java
@@ -15,6 +15,7 @@ public class Agent {
 
         inst.addTransformer((classLoader, resource, aClass, protectionDomain, uninstrumentedByteCode) -> {
             if (!shouldExclude(resource, excludes).get()) {
+                System.out.println("instrumenting "+resource);
                 try {
                     return instrumentMethod(resource);
                 } catch (Exception ex) {