diff --git a/src/ChangeLog b/src/ChangeLog
index 5080dc7f3..5b7c93a33 100644
--- a/src/ChangeLog
+++ b/src/ChangeLog
@@ -1,6 +1,8 @@
 2004-09-26  Roland Illig  <roland.illig@gmx.de>
 
 	* pipethrough.c: #include <string.h> to compile on Solaris.
+	* util.h (convert_controls): Adjusted the comment to what the
+	function really does.
 
 2004-09-26  Mike Gorchak  <mike@malva.ua>
 
diff --git a/src/util.h b/src/util.h
index 52fabda9d..03a3a76ab 100644
--- a/src/util.h
+++ b/src/util.h
@@ -59,8 +59,10 @@ const char *skip_separators (const char *s);
 const char *skip_numbers (const char *s);
 char *strip_ctrl_codes (char *s);
 
-/* in-place conversion. returns s. */
-char *convert_controls (char *s);
+/* Replaces "\\E" and "\\e" with "\033". Replaces "^" + [a-z] with
+ * ((char) 1 + (c - 'a')). The same goes for "^" + [A-Z].
+ * Returns a newly allocated string. */
+char *convert_controls (const char *s);
 
 /* overwrites passwd with '\0's and frees it. */
 void wipe_password (char *passwd);