diff --git a/app/builders/notification_subscription_builder.rb b/app/builders/notification_subscription_builder.rb
index 3326b5cde..c1574bfc1 100644
--- a/app/builders/notification_subscription_builder.rb
+++ b/app/builders/notification_subscription_builder.rb
@@ -12,7 +12,7 @@ class NotificationSubscriptionBuilder
 
   def identifier
     @identifier ||= params[:subscription_attributes][:endpoint] if params[:subscription_type] == 'browser_push'
-    @identifier ||= params[:device_id] if params[:subscription_type] == 'fcm'
+    @identifier ||= params[:subscription_attributes][:device_id] if params[:subscription_type] == 'fcm'
     @identifier
   end