diff --git a/src/java/com/samskivert/util/CalendarUtil.java b/src/java/com/samskivert/util/CalendarUtil.java
index 329232bb..d3fbfb6f 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 (!end.after(start));
+        } while (!start.after(end));
 
         return months;
     }