diff --git a/xwords4/android/app/src/main/java/org/eehouse/android/xw4/DelegateBase.java b/xwords4/android/app/src/main/java/org/eehouse/android/xw4/DelegateBase.java
index 5b9f4da1b..144c61b91 100644
--- a/xwords4/android/app/src/main/java/org/eehouse/android/xw4/DelegateBase.java
+++ b/xwords4/android/app/src/main/java/org/eehouse/android/xw4/DelegateBase.java
@@ -163,6 +163,7 @@ public class DelegateBase implements DlgClickNotify,
         }
         if ( this != result ) {
             Log.d( TAG, "%s.curThis() => " + result, this.toString() );
+            Assert.fail();
         }
         return result;
     }