diff --git a/doc/foot.1.scd b/doc/foot.1.scd
index 7c2dbccd..551b6a33 100644
--- a/doc/foot.1.scd
+++ b/doc/foot.1.scd
@@ -194,6 +194,9 @@ Note that these are just the defaults; they can be changed in the
 *middle*
 	Paste from the _primary_ selection
 
+*right*
+	Extend current selection
+
 *wheel*
 	Scroll up/down in history