diff --git a/components/lib/dialog/Dialog.vue b/components/lib/dialog/Dialog.vue
index 42e5e3226..1000f52d3 100755
--- a/components/lib/dialog/Dialog.vue
+++ b/components/lib/dialog/Dialog.vue
@@ -338,6 +338,7 @@ export default {
                         if (topPos >= this.minY && topPos + height < viewport.height) {
                             this.lastPageY = event.pageY;              
                             this.container.style.top = topPos - marginTop + 'px';
+                        }
                     } else {
                         this.lastPageX = event.pageX;
                         this.container.style.left = leftPos - marginLeft + 'px';