1 files changed, 1 insertions, 1 deletions
diff --git a/dom/base/nsNodeUtils.cpp b/dom/base/nsNodeUtils.cpp
index 85cd791c5..f79da6652 100644
--- a/dom/base/nsNodeUtils.cpp
+++ b/dom/base/nsNodeUtils.cpp
@@ -501,7 +501,7 @@ nsNodeUtils::CloneAndAdopt(nsINode *aNode, bool aClone, bool aDeep,
           nsContentUtils::LookupCustomElementDefinition(nodeInfo->GetDocument(),
                                                         nodeInfo->LocalName(),
                                                         nodeInfo->NamespaceID(),
-                                                        extension.IsEmpty() ? nullptr : &extension);
+                                                        typeAtom);
         if (definition) {
           nsContentUtils::EnqueueUpgradeReaction(cloneElem, definition);
         }