--- a/doc/book/en/development/devcore/vreg.rst	Wed Feb 03 20:34:44 2010 +0100
+++ b/doc/book/en/development/devcore/vreg.rst	Wed Feb 03 20:35:19 2010 +0100
@@ -76,6 +76,8 @@
 means that one of them should return a positive score. On success, the first
 positive score is returned.
 
+You can also "negate"  a selector by precedeing it by the `~` operator.
+
 Of course you can use paren to balance expressions.