diff --git a/printf.lisp b/printf.lisp
index 88b34f7..bdb06b9 100644
--- a/printf.lisp
+++ b/printf.lisp
@@ -1,6 +1,7 @@
 ;;;; Make a macro that is like C's printf statement
 
 (defmacro printf (string &rest vars)
+  "Pretend to be printf... except preceding dec places"
   `(format t ,(printf-to-format string) ,@vars))
 
 (defun replace-all (string part replacement &key (test #'char=))