diff --git a/www/common/onlyoffice/inner.js b/www/common/onlyoffice/inner.js
index dd085a9dc..306b166dd 100644
--- a/www/common/onlyoffice/inner.js
+++ b/www/common/onlyoffice/inner.js
@@ -1586,6 +1586,8 @@ define([
                         var $tb = $iframe.find('head');
                         var css = // Old OO
                                   //'#id-toolbar-full .toolbar-group:nth-child(2), #id-toolbar-full .separator:nth-child(3) { display: none; }' +
+                                  '#slot-btn-inschart { display: none !important; }' + // XXX XXX
+                                  '#slot-btn-insertchart { display: none !important; }' + // XXX XXX
                                   //'#fm-btn-save { display: none !important; }' +
                                   //'#panel-settings-general tr.autosave { display: none !important; }' +
                                   //'#panel-settings-general tr.coauth { display: none !important; }' +
@@ -1630,6 +1632,27 @@ define([
                         }
                     },
                     "onDocumentReady": function () {
+                        // XXX remove the following block
+                        try {
+                        var app = common.getMetadataMgr().getPrivateData().ooType;
+                        var d, hasChart;
+                        if (app === 'doc') {
+                            d = getEditor().GetDocument();
+                            hasChart = d.GetAllCharts().length;
+                            if (hasChart) { Feedback.send('OO_DOC_CHART', true); }
+                        } else if (app === 'presentation') {
+                            d = getEditor().GetPresentation().Presentation;
+                            hasChart = d.Slides.some(function (slide) {
+                                return slide.getDrawingObjects().some(function (obj) {
+                                    return obj instanceof getWindow().AscFormat.CChartSpace;
+                                });
+                            });
+                            if (hasChart) { Feedback.send('OO_SLIDE_CHART', true); }
+                        }
+                        } catch (e) {}
+
+
+
                         evOnSync.fire();
                         var onMigrateRdy = Util.mkEvent();
                         onMigrateRdy.reg(function () {