diff --git a/pmd/src/net/sourceforge/pmd/typeresolution/PMDASMClassLoader.java b/pmd/src/net/sourceforge/pmd/typeresolution/PMDASMClassLoader.java
index 810be14a76..0fc7eb2ec2 100644
--- a/pmd/src/net/sourceforge/pmd/typeresolution/PMDASMClassLoader.java
+++ b/pmd/src/net/sourceforge/pmd/typeresolution/PMDASMClassLoader.java
@@ -50,7 +50,7 @@ public class PMDASMClassLoader extends ClassLoader {
             return asmVisitor.getPackages();
         } catch (IOException e) {
             dontBother.add(name);
-            throw new ClassNotFoundException(name);
+            throw new ClassNotFoundException(name, e);
         }
     }
 }
\ No newline at end of file