diff --git a/chrome/content/zotero/xpcom/data/item.js b/chrome/content/zotero/xpcom/data/item.js
index 923961113b..2e9af99a59 100644
--- a/chrome/content/zotero/xpcom/data/item.js
+++ b/chrome/content/zotero/xpcom/data/item.js
@@ -2248,6 +2248,14 @@ Zotero.Item.prototype.isEmbeddedImageAttachment = function() {
 }
 
 
+/**
+ * @return {Boolean} - Returns true if item is a stored or linked PDF attachment
+ */
+Zotero.Item.prototype.isPDFAttachment = function () {
+	return this.isAttachment() && this.attachmentContentType == 'application/pdf';
+};
+
+
 /**
  * Returns number of child attachments of item
  *