diff --git a/lisp/org.el b/lisp/org.el
index 3c754a239..eea91d393 100644
--- a/lisp/org.el
+++ b/lisp/org.el
@@ -11346,7 +11346,7 @@ See also `org-scan-tags'."
   (let ((match0 match)
 	(re (concat
 	     "^&?\\([-+:]\\)?\\({[^}]+}\\|LEVEL\\([<=>]\\{1,2\\}\\)"
-	     "\\([0-9]+\\)\\|\\(\\(?:[[:alnum:]_]+\\(?:\\\\-\\)*\\)+\\)"
+	     "\\([0-9]+\\)\\|\\([[:alnum:]_]\\(?:[[:alnum:]_]\\|\\\\-\\)*\\)"
 	     "\\([<>=]\\{1,2\\}\\)"
 	     "\\({[^}]+}\\|\"[^\"]*\"\\|-?[.0-9]+\\(?:[eE][-+]?[0-9]+\\)?\\)"
 	     "\\|" org-tag-re "\\)"))