diff --git a/src/test/org/apache/commons/collections/LocalTestNode.java b/src/test/org/apache/commons/collections/LocalTestNode.java
index 20dfdcdc9..bc05e9a1f 100644
--- a/src/test/org/apache/commons/collections/LocalTestNode.java
+++ b/src/test/org/apache/commons/collections/LocalTestNode.java
@@ -71,7 +71,8 @@ class LocalTestNode implements Comparable {
      *
      * @param o
      *
-     * @return
+     * @return a negative integer, zero, or a positive integer
+     *  as this object is less than, equal to, or greater than the specified object.
      */
     public int compareTo(Object o) {