diff --git a/apps/documenteditor/mobile/src/controller/edit/EditText.jsx b/apps/documenteditor/mobile/src/controller/edit/EditText.jsx
index 922458b4b..b71bd38c5 100644
--- a/apps/documenteditor/mobile/src/controller/edit/EditText.jsx
+++ b/apps/documenteditor/mobile/src/controller/edit/EditText.jsx
@@ -18,7 +18,7 @@ class EditTextController extends Component {
             if (isDecrement) {
                 typeof size === 'undefined' ? api.FontSizeOut() : size = Math.max(1, --size);
             } else {
-                typeof size === 'undefined' ? api.FontSizeIn : size = Math.min(300, ++size);
+                typeof size === 'undefined' ? api.FontSizeIn() : size = Math.min(300, ++size);
             }
             if (typeof size !== 'undefined') {
                 api.put_TextPrFontSize(size);