diff --git a/src/components/layout/layout.vue b/src/components/layout/layout.vue
index ba22f28..a1e5db9 100644
--- a/src/components/layout/layout.vue
+++ b/src/components/layout/layout.vue
@@ -96,6 +96,7 @@ export default {
         // #endif
         if (this.hasPaddingTop) {
             this.bodyPt = this.header.pt + this.header.height;
+            this.$emit("input", this.bodyPt);
         }
     },
     methods: {