diff --git a/Userland/Libraries/LibWeb/DOM/Node.cpp b/Userland/Libraries/LibWeb/DOM/Node.cpp
index 7c23bca5d8f..b4a3f22b299 100644
--- a/Userland/Libraries/LibWeb/DOM/Node.cpp
+++ b/Userland/Libraries/LibWeb/DOM/Node.cpp
@@ -1040,6 +1040,7 @@ WebIDL::ExceptionOr<JS::NonnullGCPtr<Node>> Node::clone_node(Document* document,
     }
 
     // 7. Return copy.
+    VERIFY(copy);
     return JS::NonnullGCPtr { *copy };
 }