diff --git a/services/core/java/com/android/server/media/MediaButtonReceiverHolder.java b/services/core/java/com/android/server/media/MediaButtonReceiverHolder.java
index b9997e0c2ec8f..0a4d17f20aec3 100644
--- a/services/core/java/com/android/server/media/MediaButtonReceiverHolder.java
+++ b/services/core/java/com/android/server/media/MediaButtonReceiverHolder.java
@@ -259,7 +259,7 @@ final class MediaButtonReceiverHolder {
             return "";
         }
         return String.join(COMPONENT_NAME_USER_ID_DELIM,
-                mComponentName.toString(),
+                mComponentName.flattenToString(),
                 String.valueOf(mUserId),
                 String.valueOf(mComponentType));
     }