diff --git a/pmd/src/net/sourceforge/pmd/symboltable/ClassScope.java b/pmd/src/net/sourceforge/pmd/symboltable/ClassScope.java
index b52b498873..81d99a63b0 100644
--- a/pmd/src/net/sourceforge/pmd/symboltable/ClassScope.java
+++ b/pmd/src/net/sourceforge/pmd/symboltable/ClassScope.java
@@ -7,6 +7,7 @@ import java.util.List;
 
 public class ClassScope extends AbstractScope {
 
+    // TODO this is a hack, it will break given sufficiently nested classes
     private static int anonymousCounter = 1;
 
     private String className;