diff -r ded3cd1312c1 -r 8158421193e3 src/widgets/Markers.js
--- a/src/widgets/Markers.js	Fri Sep 18 17:21:12 2015 +0200
+++ b/src/widgets/Markers.js	Mon Sep 21 18:24:32 2015 +0200
@@ -505,7 +505,7 @@
 
 IriSP.Widgets.Markers.prototype.sendDelete = function(){
     _this = this;
-    _url = Mustache.to_html(this.api_endpoint_template_delete, {annotation_id: this.selectedMarker ? this.selectedMarker.id : ""});
+    _url = Mustache.to_html(this.api_endpoint_template_delete, {annotation_id: this.selectedMarker ? this.selectedMarker.id : "", project_id: this.selectedMarker.project_id? this.selectedMarker.project_id : this.project_id});
     IriSP.jQuery.ajax({
         url: _url,
         type: this.api_method_delete,