diff --git a/docs/book/pir/ch04_variables.pod b/docs/book/pir/ch04_variables.pod
index f4c14f7..53b5fa0 100644
--- a/docs/book/pir/ch04_variables.pod
+++ b/docs/book/pir/ch04_variables.pod
@@ -970,7 +970,7 @@ X<UTF-8 encoding>
 X<UTF-16 encoding>
 Parrot supports the character sets C<ascii>, C<binary>, C<iso-8859-1>
 (Latin 1), and C<unicode> and the encodings C<fixed_8>, C<ucs2>,
-C<utf8>, and C<utf18>.
+C<utf8>, and C<utf16>.
 
 The C<binary:> charset treats the string as a buffer of raw unformatted
 binary data. It isn't really a string per se, because binary data