diff --git a/app/src/main/res/layout/activity_book_info.xml b/app/src/main/res/layout/activity_book_info.xml
index 6c6aa2bea..a99fab5b2 100644
--- a/app/src/main/res/layout/activity_book_info.xml
+++ b/app/src/main/res/layout/activity_book_info.xml
@@ -18,7 +18,7 @@
         android:id="@+id/refresh_layout"
         android:layout_width="match_parent"
         android:layout_height="wrap_content"
-        app:layout_constraintTop_toTopOf="parent" />
+        app:layout_constraintTop_toTopOf="parent" >
 
         <LinearLayout
             android:id="@+id/vw_bg"