diff --git a/xwords4/android/app/src/main/res/xml/xwprefs.xml b/xwords4/android/app/src/main/res/xml/xwprefs.xml
index 7892f5df3..a6c5d697f 100644
--- a/xwords4/android/app/src/main/res/xml/xwprefs.xml
+++ b/xwords4/android/app/src/main/res/xml/xwprefs.xml
@@ -401,7 +401,7 @@
     <CheckBoxPreference android:key="@string/key_enable_dup_invite"
                         android:title="@string/enable_dupes_title"
                         android:summary="@string/enable_dupes_summary"
-                        android:defaultValue="false"
+                        android:defaultValue="@bool/DEBUG"
                         />
 
     <CheckBoxPreference android:key="@string/key_enable_pending_count"