diff --git a/ActiveSync/iCalEvent+ActiveSync.m b/ActiveSync/iCalEvent+ActiveSync.m
index d81ac8774..ffdaac244 100644
--- a/ActiveSync/iCalEvent+ActiveSync.m
+++ b/ActiveSync/iCalEvent+ActiveSync.m
@@ -891,6 +891,8 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
           [self setAttendees: attendees];
         }
     }
+
+  [self setLastModified: [NSCalendarDate calendarDate]];
 }
 
 - (void) changeParticipationStatus: (NSDictionary *) theValues