diff --git a/src/java/com/samskivert/util/CalendarUtil.java b/src/java/com/samskivert/util/CalendarUtil.java
index 7c9f4bfa..329232bb 100644
--- a/src/java/com/samskivert/util/CalendarUtil.java
+++ b/src/java/com/samskivert/util/CalendarUtil.java
@@ -83,7 +83,7 @@ public class CalendarUtil
         do {
             end.add(Calendar.MONTH, -1);
             months++;
-        } while (start.before(end));
+        } while (!end.after(start));
 
         return months;
     }