diff --git a/content/base/src/nsContentUtils.cpp b/content/base/src/nsContentUtils.cpp
index 3160a80bfd94..c5d1e2e90f77 100644
--- a/content/base/src/nsContentUtils.cpp
+++ b/content/base/src/nsContentUtils.cpp
@@ -3730,7 +3730,6 @@ nsContentUtils::CreateContextualFragment(nsIDOMNode* aContextNode,
       if (!parser) {
         return NS_ERROR_OUT_OF_MEMORY;
       }
-      document->SetFragmentParser(parser);
     }
     nsCOMPtr<nsIDOMDocumentFragment> frag;
     rv = NS_NewDocumentFragment(getter_AddRefs(frag), document->NodeInfoManager());
@@ -3760,6 +3759,7 @@ nsContentUtils::CreateContextualFragment(nsIDOMNode* aContextNode,
     }
   
     NS_ADDREF(*aReturn = frag);
+    document->SetFragmentParser(parser);
     return NS_OK;
   }