diff --git a/doc/astspec.txt b/doc/astspec.txt
index 019b735f58..e7bbcecc23 100644
--- a/doc/astspec.txt
+++ b/doc/astspec.txt
@@ -1033,7 +1033,7 @@ AST:
       nnkEmpty(), # no pragmas here
       nnkOfInherit(
         nnkIdent("RootObj") # inherits from RootObj
-      )
+      ),
       nnkEmpty()
     )
   )