diff --git a/src/angular-leaflet-directive.js b/src/angular-leaflet-directive.js
index <HASH>..<HASH> 100644
--- a/src/angular-leaflet-directive.js
+++ b/src/angular-leaflet-directive.js
@@ -67,6 +67,8 @@ leafletDirective.directive("leaflet", ["$http", "$log", "$parse", function ($htt
             setupMarkers();
             setupPaths();
 
+            // use of leafletDirectiveSetMap event is not encouraged. only use
+            // it when there is no easy way to bind data to the directive
             $scope.$on('leafletDirectiveSetMap', function(event, message) {
                 var meth = message.shift();
                 map[meth].apply(map, message);
add comment in source for setmap event