diff --git a/src/java/com/threerings/stats/data/IntSetStat.java b/src/java/com/threerings/stats/data/IntSetStat.java
index d5695f6a..97ff87ba 100644
--- a/src/java/com/threerings/stats/data/IntSetStat.java
+++ b/src/java/com/threerings/stats/data/IntSetStat.java
@@ -10,6 +10,9 @@ import com.samskivert.util.StringUtil;
 import com.threerings.io.ObjectInputStream;
 import com.threerings.io.ObjectOutputStream;
 
+/**
+ * Used to track a statistic comprised of a bounded set of integers.
+ */
 public class IntSetStat extends Stat
 {
     /**