diff --git a/chrome/content/zotero/xpcom/translation/translate_item.js b/chrome/content/zotero/xpcom/translation/translate_item.js
index daf0b5a120..8420189001 100644
--- a/chrome/content/zotero/xpcom/translation/translate_item.js
+++ b/chrome/content/zotero/xpcom/translation/translate_item.js
@@ -310,6 +310,10 @@ Zotero.Translate.ItemSaver.prototype = {
 				|| downloadAssociatedFiles;
 			if(!shouldAttach) return;
 			
+			if(attachment.document && "__wrappedDOMObject" in attachment.document) {
+				attachment.document = attachment.document.__wrappedDOMObject;
+			}
+			
 			if(attachment.snapshot === false || !this._saveFiles) {
 				// if snapshot is explicitly set to false, attach as link
 				if(attachment.document) {