diff --git a/make-book.retro b/make-book.retro
index a5e7510..58b684b 100755
--- a/make-book.retro
+++ b/make-book.retro
@@ -67,7 +67,7 @@ for me.
 :import        here swap BOOK-BASE s:prepend file:slurp ;
 :\n            ASCII:LF @Out file:write ;
 :add-to-book   here [ @Out file:write ] s:for-each \n ;
-:process-files [ import add-to-book ] a:for-each ;
+:process-files [ import add-to-book $. c:put ] a:for-each nl ;
 :open          'RETRO-Book.md file:open<for-writing> !Out ;
 :close         @Out file:close ;
 :assemble      open process-files close ;