diff --git a/app/src/main/res/layout/activity_details.xml b/app/src/main/res/layout/activity_details.xml
index e8f68ce9..790cefc4 100644
--- a/app/src/main/res/layout/activity_details.xml
+++ b/app/src/main/res/layout/activity_details.xml
@@ -3,7 +3,7 @@
     xmlns:tools="http://schemas.android.com/tools"
     android:layout_width="match_parent"
     android:layout_height="match_parent"
-    tools:context=".DetailsActivity">
+    tools:context="org.transdroid.core.gui.DetailsActivity">
 
     <androidx.appcompat.widget.Toolbar
         android:id="@+id/selection_toolbar"