diff --git a/lib/rpush/client/active_model/fcm/notification.rb b/lib/rpush/client/active_model/fcm/notification.rb
index c2d0b7b65..dc16ef894 100644
--- a/lib/rpush/client/active_model/fcm/notification.rb
+++ b/lib/rpush/client/active_model/fcm/notification.rb
@@ -66,9 +66,8 @@ def as_json(options = nil) # rubocop:disable Metrics/PerceivedComplexity
           end
 
           def android_config
-            json = {
-              'notification' => android_notification,
-            }
+            json = {}
+            json['notification'] = android_notification if notification
             json['collapse_key'] = collapse_key if collapse_key
             json['priority'] = priority_str if priority
             json['ttl'] = "#{expiry}s" if expiry