diff --git a/dom/events/DOMEventTargetHelper.cpp b/dom/events/DOMEventTargetHelper.cpp
index ffec574dc60f..3f9e35333683 100644
--- a/dom/events/DOMEventTargetHelper.cpp
+++ b/dom/events/DOMEventTargetHelper.cpp
@@ -31,7 +31,12 @@ NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INTERNAL(DOMEventTargetHelper)
     if (tmp->mOwnerWindow && tmp->mOwnerWindow->GetExtantDoc()) {
       tmp->mOwnerWindow->GetExtantDoc()->GetDocumentURI(uri);
     }
-    snprintf_literal(name, "DOMEventTargetHelper %s",
+
+    nsXPCOMCycleCollectionParticipant* participant = nullptr;
+    CallQueryInterface(tmp, &participant);
+
+    snprintf_literal(name, "%s %s",
+                     participant->ClassName(),
                      NS_ConvertUTF16toUTF8(uri).get());
     cb.DescribeRefCountedNode(tmp->mRefCnt.get(), name);
   } else {