diff --git a/apps/presentationeditor/main/app/controller/Toolbar.js b/apps/presentationeditor/main/app/controller/Toolbar.js
index c0597dd4c..b441a9ea1 100644
--- a/apps/presentationeditor/main/app/controller/Toolbar.js
+++ b/apps/presentationeditor/main/app/controller/Toolbar.js
@@ -832,7 +832,7 @@ define([
                 if (this._state.activated) this._state.prcontrolsdisable = paragraph_locked;
                 if (paragraph_locked!==undefined)
                     this.toolbar.lockToolbar(Common.enumLock.paragraphLock, paragraph_locked, {array: me.toolbar.paragraphControls});
-                this.toolbar.lockToolbar(Common.enumLock.paragraphLock, paragraph_locked===true, {array: [me.toolbar.btnInsDateTime, me.toolbar.btnInsSlideNum]});
+                this.toolbar.lockToolbar(Common.enumLock.paragraphLock, paragraph_locked===true, {array: [me.toolbar.btnInsDateTime, me.toolbar.btnInsSlideNum, me.toolbar.btnInsertEquation]});
             }
 
             if (this._state.no_paragraph !== no_paragraph) {
diff --git a/apps/presentationeditor/main/app/view/Toolbar.js b/apps/presentationeditor/main/app/view/Toolbar.js
index a25775d08..4aa5eac3d 100644
--- a/apps/presentationeditor/main/app/view/Toolbar.js
+++ b/apps/presentationeditor/main/app/view/Toolbar.js
@@ -782,7 +782,7 @@ define([
                         cls: 'btn-toolbar x-huge icon-top',
                         iconCls: 'toolbar__icon btn-insertequation',
                         caption: me.capInsertEquation,
-                        lock: [_set.slideDeleted, _set.lostConnect, _set.noSlides, _set.disableOnStart],
+                        lock: [_set.slideDeleted, _set.paragraphLock, _set.lostConnect, _set.noSlides, _set.disableOnStart],
                         split: true,
                         menu: new Common.UI.Menu({cls: 'menu-shapes'}),
                         dataHint: '1',