diff --git a/app/src/main/res/layout/chapter_column.xml b/app/src/main/res/layout/chapter_column.xml
index 649f78e50..17f2c3487 100644
--- a/app/src/main/res/layout/chapter_column.xml
+++ b/app/src/main/res/layout/chapter_column.xml
@@ -3,6 +3,7 @@
     xmlns:app="http://schemas.android.com/apk/res-auto"
     android:layout_width="wrap_content"
     android:layout_height="match_parent"
+    xmlns:tools="http://schemas.android.com/tools"
     android:background="?attr/selectableItemBackground"
     android:backgroundTint="@android:color/transparent"
     app:strokeWidth="0dp">