diff --git a/src/main/java/com/samskivert/util/Interval.java b/src/main/java/com/samskivert/util/Interval.java
index 247a68e1..e7824d80 100644
--- a/src/main/java/com/samskivert/util/Interval.java
+++ b/src/main/java/com/samskivert/util/Interval.java
@@ -32,7 +32,7 @@ public abstract class Interval
         public boolean isRunning () {
             throw new UnsupportedOperationException("dummy");
         }
-        public String toString () {
+        @Override public String toString () {
             return "<direct>";
         }
     };