diff --git a/beancount.el b/beancount.el
index 597aa0a..969e6cc 100644
--- a/beancount.el
+++ b/beancount.el
@@ -238,8 +238,7 @@ _not_ followed by an account.")
 
 (defconst beancount-transaction-regexp
   (concat "^\\(" beancount-date-regexp "\\) +"
-          "\\(?:txn +\\)?"
-          "\\(" beancount-flag-regexp "\\) +"
+          "\\(\\(?:txn+\\)\\|" beancount-flag-regexp "\\) +"
           "\\(\".*\"\\)"))
 
 (defconst beancount-posting-regexp