diff --git a/module/programplan/view/gantt.html.php b/module/programplan/view/gantt.html.php
index f2c8f1da5d..6e2ef548d5 100755
--- a/module/programplan/view/gantt.html.php
+++ b/module/programplan/view/gantt.html.php
@@ -944,5 +944,12 @@ $(function()
     {
         return validateResources(id);
     });
+
+    gantt.attachEvent("onRowDragStart", function(id, target, e) {
+        //any custom logic here
+        var task = gantt.getTask(id);
+        if(task.type != 'task') return false;
+        return true;
+    });
 });
 </script>