diff --git a/apps/spreadsheeteditor/main/app/controller/Main.js b/apps/spreadsheeteditor/main/app/controller/Main.js
index 1da261a88..95cc2d548 100644
--- a/apps/spreadsheeteditor/main/app/controller/Main.js
+++ b/apps/spreadsheeteditor/main/app/controller/Main.js
@@ -872,7 +872,6 @@ define([
                     this.appOptions.canChat        = this.appOptions.canLicense && !this.appOptions.isOffline && !((typeof (this.editorConfig.customization) == 'object') && this.editorConfig.customization.chat===false);
                     this.appOptions.canRename      = !!this.permissions.rename;
                     this.appOptions.trialMode      = params.asc_getLicenseMode();
-                    this.appOptions.canProtect     = this.appOptions.isEdit && this.appOptions.isDesktopApp && this.appOptions.isOffline && this.api.asc_isSignaturesSupport();
                     this.appOptions.canModifyFilter = (this.permissions.modifyFilter!==false);
                     this.appOptions.canBranding  = (licType === Asc.c_oLicenseResult.Success) && (typeof this.editorConfig.customization == 'object');
                     if (this.appOptions.canBranding)
@@ -897,6 +896,7 @@ define([
                                                 (typeof (this.editorConfig.customization) == 'object' && !!this.editorConfig.customization.forcesave);
                 this.appOptions.forcesave      = this.appOptions.canForcesave;
                 this.appOptions.canEditComments= this.appOptions.isOffline || !(typeof (this.editorConfig.customization) == 'object' && this.editorConfig.customization.commentAuthorOnly);
+                this.appOptions.canProtect     = this.appOptions.isEdit && this.appOptions.isDesktopApp && this.appOptions.isOffline && this.api.asc_isSignaturesSupport() && !(this.appOptions.isEditDiagram || this.appOptions.isEditMailMerge);
 
                 this.applyModeCommonElements();
                 this.applyModeEditorElements();