diff --git a/sdn.1 b/sdn.1
index 2f4e4d8..2b3ebd4 100644
--- a/sdn.1
+++ b/sdn.1
@@ -67,8 +67,8 @@ The viewer program to be launched by the F3 key binding as well as to show
 the internal help message.  If none is set, it defaults to
 .Xr less 1 .
 .It Ev VISUAL , Ev EDITOR
-The editor program to be launched by the F4 key binding.  If none is set,
-it defaults to
+The editor program to be launched by the F4 key binding.  If neither variable
+is set, it defaults to
 .Xr vi 1 .
 .El
 .Sh FILES