diff --git a/test/java/nio/MappedByteBuffer/Truncate.java b/test/java/nio/MappedByteBuffer/Truncate.java
index 09dee07..be74c80 100644
--- a/test/java/nio/MappedByteBuffer/Truncate.java
+++ b/test/java/nio/MappedByteBuffer/Truncate.java
@@ -88,6 +88,11 @@
             }
         };
         Thread t = new Thread(r);
+        t.setUncaughtExceptionHandler(new Thread.UncaughtExceptionHandler() {
+            public void uncaughtException(Thread t, Throwable e) {
+                e.printStackTrace();
+            }
+        });
         t.start();
         try { t.join(); } catch (InterruptedException ignore) { }
     }