diff --git a/_projects/public-tree-map.md b/_projects/public-tree-map.md
index c22da9e922..4f96ce3ed8 100644
--- a/_projects/public-tree-map.md
+++ b/_projects/public-tree-map.md
@@ -21,6 +21,7 @@ leadership:
       github: 'https://github.com/isabelle-wagenvoord'
     picture: https://avatars.githubusercontent.com/isabelle-wagenvoord
   - name: Mark Jackson
+    github-handle:
     role: Backend Developer
     links:
       slack: 'https://hackforla.slack.com/team/UNQTRN0DC'