diff --git a/lisp/llvm-lib/llvm-act-on-file/act-on-test-file.el b/lisp/llvm-lib/llvm-act-on-file/act-on-test-file.el
index af9c004..eecec7e 100644
--- a/lisp/llvm-lib/llvm-act-on-file/act-on-test-file.el
+++ b/lisp/llvm-lib/llvm-act-on-file/act-on-test-file.el
@@ -43,7 +43,7 @@
                            (find-file-noselect file))
     (save-excursion
       (goto-char (point-min))
-      (let ((r (rx line-start (+ (or "|" ";" "/" "#")) (+ " ") "RUN:" (+ space) (group(+ nonl) line-end)))
+      (let ((r (rx line-start (+ (or "|" ";" "/" "#")) (+ " ") "RUN:" (+ space) (group (+ nonl) line-end)))
             (temp "")
             l)
         (while (re-search-forward r nil t)