diff --git a/Modules/readline.c b/Modules/readline.c
index ff06ddf24fb..7d681db7791 100644
--- a/Modules/readline.c
+++ b/Modules/readline.c
@@ -1,6 +1,7 @@
 /* This module makes GNU readline available to Python.  It has ideas
  * contributed by Lee Busby, LLNL, and William Magro, Cornell Theory
- * Center.  The completer interface was inspired by Lele Gaifax.
+ * Center.  The completer interface was inspired by Lele Gaifax.  More
+ * recently, it was largely rewritten by Guido van Rossum.
  */
 
 /* Standard definitions */