diff --git a/src/java/com/threerings/presents/server/PresentsDObjectMgr.java b/src/java/com/threerings/presents/server/PresentsDObjectMgr.java
index 87f46147a..502b0cd7f 100644
--- a/src/java/com/threerings/presents/server/PresentsDObjectMgr.java
+++ b/src/java/com/threerings/presents/server/PresentsDObjectMgr.java
@@ -280,6 +280,7 @@ public class PresentsDObjectMgr
     public Interval newInterval (final Runnable action)
     {
         return new Interval() {
+            @Override
             public void expired () {
                 if (isRunning()) {
                     postRunnable(new Runnable() {
@@ -296,6 +297,11 @@ public class PresentsDObjectMgr
                     cancel();
                 }
             }
+
+            @Override
+            public String toString() {
+                return "DObjectManagerInterval(" + action + ")";
+            }
         };
     }