--- old/agent/src/share/classes/sun/jvm/hotspot/tools/JStack.java	2013-06-25 10:52:37.422786002 +0100
+++ new/agent/src/share/classes/sun/jvm/hotspot/tools/JStack.java	2013-06-25 10:52:37.332786002 +0100
@@ -24,6 +24,8 @@
 
 package sun.jvm.hotspot.tools;
 
+import sun.jvm.hotspot.debugger.JVMDebugger;
+
 public class JStack extends Tool {
     public JStack(boolean mixedMode, boolean concurrentLocks) {
         this.mixedMode = mixedMode;
@@ -34,6 +36,10 @@
         this(true, true);
     }
 
+    public JStack(JVMDebugger d) {
+        super(d);
+    }
+
     protected boolean needsJavaPrefix() {
         return false;
     }