diff --git a/app/src/main/java/dev/wander/android/opentagviewer/util/parse/CustomAccessoryParser.java b/app/src/main/java/dev/wander/android/opentagviewer/util/parse/CustomAccessoryParser.java
index 259f060b..5bdcc5c7 100644
--- a/app/src/main/java/dev/wander/android/opentagviewer/util/parse/CustomAccessoryParser.java
+++ b/app/src/main/java/dev/wander/android/opentagviewer/util/parse/CustomAccessoryParser.java
@@ -107,7 +107,11 @@ static BeaconInformation parse(
                 .productId(0)
                 .vendorId(0)
                 .batteryLevel(0)
-                .stableIdentifier(List.of());
+                .stableIdentifier(List.of())
+                // The map card's Ring reads this: without it a self-generated tag had no
+                // accessory to derive addresses from ("Could not compute this accessory's
+                // current address"), while the device screen - which reads the row - worked.
+                .ownedBeaconAccessoryJson(beaconData.getOwnedBeaconInfo().accessoryJson);
 
         if (userOverrides != null) {
             built.userOverrideName(userOverrides.uiName)