diff --git a/components/lib/dialog/Dialog.vue b/components/lib/dialog/Dialog.vue
index 49f77e9ae..762db37f9 100755
--- a/components/lib/dialog/Dialog.vue
+++ b/components/lib/dialog/Dialog.vue
@@ -301,7 +301,7 @@ export default {
                 this.lastPageY = event.pageY;
 
                 this.container.style.margin = '0';
-                document.body.setAttribute('data-p-unselectable-text', '');
+                document.body.setAttribute('data-p-unselectable-text', 'true');
                 !this.isUnstyled && DomHandler.addClass(document.body, 'p-unselectable-text');
             }
         },