diff --git a/chrome/content/zotero/xpcom/recognizePDF.js b/chrome/content/zotero/xpcom/recognizePDF.js
index 7f6e9844b..23f4c96a9 100644
--- a/chrome/content/zotero/xpcom/recognizePDF.js
+++ b/chrome/content/zotero/xpcom/recognizePDF.js
@@ -135,13 +135,12 @@ Zotero.RecognizePDF = new function () {
 	
 	
 	this.canUnrecognize = function (item) {
-		var threshold = UNRECOGNIZE_TIMEOUT;
-		var added = _newItems.get(item);
+		var { dateModified } = _newItems.get(item) || {};
 		// Item must have been recognized recently, must not have been modified since it was
 		// created, and must have only one attachment and no other children
-		if (!added
-				|| Zotero.Date.sqlToDate(added, true) < new Date() - threshold
-				|| item.dateModified != added
+		if (!dateModified
+				|| Zotero.Date.sqlToDate(dateModified, true) < new Date() - UNRECOGNIZE_TIMEOUT
+				|| item.dateModified != dateModified
 				|| item.numAttachments(true) != 1
 				|| item.numChildren(true) != 1) {
 			_newItems.delete(item);
@@ -160,7 +159,22 @@ Zotero.RecognizePDF = new function () {
 	
 	
 	this.unrecognize = async function (item) {
+		var { originalTitle, originalFilename } = _newItems.get(item);
 		var attachment = Zotero.Items.get(item.getAttachments()[0]);
+		
+		try {
+			let currentFilename = attachment.attachmentFilename;
+			if (currentFilename != originalFilename) {
+				let renamed = await attachment.renameAttachmentFile(originalFilename);
+				if (renamed) {
+					attachment.setField('title', originalTitle);
+				}
+			}
+		}
+		catch (e) {
+			Zotero.logError(e);
+		}
+		
 		return Zotero.DB.executeTransaction(async function () {
 			let collections = item.getCollections();
 			attachment.parentItemID = null
@@ -174,7 +188,7 @@ Zotero.RecognizePDF = new function () {
 	
 	this.report = async function (item) {
 		var attachment = Zotero.Items.get(item.getAttachments()[0]);
-		var filePath = await attachment.getFilePath();
+		var filePath = attachment.getFilePath();
 		if (!filePath || !await OS.File.exists(filePath)) {
 			throw new Error("File not found when reporting metadata");
 		}
@@ -355,9 +369,12 @@ Zotero.RecognizePDF = new function () {
 			await attachment.save();
 		});
 		
+		var originalTitle = attachment.getField('title');
+		var path = attachment.getFilePath();
+		var originalFilename = OS.Path.basename(path);
+		
 		// Rename attachment file to match new metadata
 		if (Zotero.Prefs.get('autoRenameFiles')) {
-			let path = attachment.getFilePath();
 			let ext = Zotero.File.getExtension(path);
 			let fileBaseName = Zotero.Attachments.getFileBaseNameFromItem(parentItem);
 			let newName = fileBaseName + (ext ? '.' + ext : '');
@@ -370,7 +387,14 @@ Zotero.RecognizePDF = new function () {
 			await attachment.saveTx();
 		}
 		
-		_newItems.set(parentItem, parentItem.dateModified);
+		_newItems.set(
+			parentItem,
+			{
+				originalTitle,
+				originalFilename,
+				dateModified: parentItem.dateModified
+			}
+		);
 		return parentItem;
 	}