diff --git a/agent/src/share/classes/sun/jvm/hotspot/runtime/JavaThread.java b/agent/src/share/classes/sun/jvm/hotspot/runtime/JavaThread.java
index d3622b050fea39ec10546626e8df850f31ecd2df..9cd4aedf6ce583c2fa8eb47a811a4bf65e1635f8 100644
--- a/agent/src/share/classes/sun/jvm/hotspot/runtime/JavaThread.java
+++ b/agent/src/share/classes/sun/jvm/hotspot/runtime/JavaThread.java
@@ -317,11 +317,11 @@ public class JavaThread extends Thread {
   }
 
   public Address getStackBase() {
-    return stackBaseField.getValue();
+    return stackBaseField.getValue(addr);
   }
 
   public long getStackSize() {
-    return stackSizeField.getValue();
+    return stackSizeField.getValue(addr);
   }
 
   /** Gets the Java-side thread object for this JavaThread */