diff --git a/org-ql-agenda.el b/org-ql-agenda.el
index 93f67f4..8b71892 100644
--- a/org-ql-agenda.el
+++ b/org-ql-agenda.el
@@ -377,10 +377,11 @@ return an empty string."
                            (warn "No marker found for item: %s" title)
                            (org-element-property :tags element))
                        (org-element-property :tags element)))
-           (tag-string (-some--> tag-list
-                                 (s-join ":" it)
-                                 (s-wrap it ":")
-                                 (org-add-props it nil 'face 'org-tag)))
+           (tag-string (when tag-list
+                         (--> tag-list
+                              (s-join ":" it)
+                              (s-wrap it ":")
+                              (org-add-props it nil 'face 'org-tag))))
            ;;  (category (org-element-property :category element))
            (priority-string (-some->> (org-element-property :priority element)
                                       (char-to-string)