diff --git a/agent/src/share/classes/sun/jvm/hotspot/tools/HeapSummary.java b/agent/src/share/classes/sun/jvm/hotspot/tools/HeapSummary.java
index 039fc37e02745a07207355b78f638147fd9e9e22..e50b6b2d089ec2199123a498c5edccb4f2bc7305 100644
--- a/agent/src/share/classes/sun/jvm/hotspot/tools/HeapSummary.java
+++ b/agent/src/share/classes/sun/jvm/hotspot/tools/HeapSummary.java
@@ -193,8 +193,12 @@ public class HeapSummary extends Tool {
 
    private static final double FACTOR = 1024*1024;
    private void printValMB(String title, long value) {
-      double mb = value / FACTOR;
-      System.out.println(alignment + title + value + " (" + mb + "MB)");
+      if (value < 0) {
+        System.out.println(alignment + title +   (value >>> 20)  + " MB");
+      } else {
+        double mb = value/FACTOR;
+        System.out.println(alignment + title + value + " (" + mb + "MB)");
+      }
    }
 
    private void printValue(String title, long value) {