diff --git a/doc/src/sgml/extend.sgml b/doc/src/sgml/extend.sgml
index 6e3d82b85b..ec95b4eb01 100644
--- a/doc/src/sgml/extend.sgml
+++ b/doc/src/sgml/extend.sgml
@@ -448,7 +448,7 @@
     of <type>anycompatible</type> and <type>anycompatiblenonarray</type>
     inputs, the array element types of <type>anycompatiblearray</type>
     inputs, the range subtypes of <type>anycompatiblerange</type> inputs,
     and the multirange subtypes of [-<type>anycompatiablemultirange</type>-]{+<type>anycompatiblemultirange</type>+}
     inputs.  If <type>anycompatiblenonarray</type> is present then the
     common type is required to be a non-array type.  Once a common type is
     identified, arguments in <type>anycompatible</type>