diff --git a/server/services/backlinks.js b/server/services/backlinks.js
index 0c127171..2502dd9c 100644
--- a/server/services/backlinks.js
+++ b/server/services/backlinks.js
@@ -38,12 +38,14 @@ export default class Backlinks {
         const document = await Document.findByPk(event.documentId);
         if (!document.publishedAt) return;
 
-        const [currentRevision, previsionRevision] = await Revision.findAll({
+        const [currentRevision, previousRevision] = await Revision.findAll({
           where: { documentId: event.documentId },
           order: [['createdAt', 'desc']],
           limit: 2,
         });
-        const previousLinkIds = parseDocumentIds(previsionRevision.text);
+        const previousLinkIds = previousRevision
+          ? parseDocumentIds(previousRevision.text)
+          : [];
         const currentLinkIds = parseDocumentIds(currentRevision.text);
         const addedLinkIds = difference(currentLinkIds, previousLinkIds);
         const removedLinkIds = difference(previousLinkIds, currentLinkIds);
diff --git a/shared/utils/parseDocumentIds.js b/shared/utils/parseDocumentIds.js
index 7dc466ac..68c08dec 100644
--- a/shared/utils/parseDocumentIds.js
+++ b/shared/utils/parseDocumentIds.js
@@ -2,7 +2,7 @@
 import MarkdownSerializer from 'slate-md-serializer';
 const Markdown = new MarkdownSerializer();
 
-export default function parseDocumentIds(text: string) {
+export default function parseDocumentIds(text: string): string[] {
   const value = Markdown.deserialize(text);
   let links = [];