diff --git a/doc/ref/ChangeLog b/doc/ref/ChangeLog
index c835c2136..d77e48653 100644
--- a/doc/ref/ChangeLog
+++ b/doc/ref/ChangeLog
@@ -1,3 +1,8 @@
+2001-12-04  Martin Grabmueller  <mg@glug.org>
+
+	* scheme-procedures.texi (Optional Arguments): Typo fix: wither ->
+	either.
+
 2001-12-01  Neil Jerram  <neil@ossau.uklinux.net>
 
 	* scheme-data.texi (Hooks): Moved into scheme-utility.texi.
diff --git a/doc/ref/scheme-procedures.texi b/doc/ref/scheme-procedures.texi
index bc186c9e5..2ba773ebf 100644
--- a/doc/ref/scheme-procedures.texi
+++ b/doc/ref/scheme-procedures.texi
@@ -86,7 +86,7 @@ order when the procedure is invoked.
 
 @c FIXME::martin: Review me!
 
-Scheme procedures, as defined in R5RS, can wither handle a fixed number
+Scheme procedures, as defined in R5RS, can either handle a fixed number
 of actual arguments, or a fixed number of actual arguments followed by
 arbitrarily many additional arguments.  Writing procedures of variable
 arity can be useful, but unfortunately, the syntactic means for handling