diff --git a/runtime/doc/usr_41.txt b/runtime/doc/usr_41.txt
index 918333e..d45ab13 100644
--- a/runtime/doc/usr_41.txt
+++ b/runtime/doc/usr_41.txt
@@ -1000,6 +1000,7 @@
 	perleval()		evaluate Perl expression (|+perl|)
 	py3eval()		evaluate Python expression (|+python3|)
 	pyeval()		evaluate Python expression (|+python|)
+	pyxeval()		evaluate |python_x| expression
 
 ==============================================================================
 *41.7*	Defining a function