diff --git a/README b/README
index 61f40b5f..efa8941c 100644
--- a/README
+++ b/README
@@ -83,14 +83,15 @@ For building on Unix:
    relies on Gtk, whereas Makefile.ux builds only the command-line
    utilities and has no Gtk dependence.
 
- - For the graphical utilities, Gtk+-1.2 and Gtk+-2.0 should both be
-   supported. If you have both installed, you can manually specify
-   which one you want by giving the option '--with-gtk=1' or
-   '--with-gtk=2' to the configure script. (2 is the default, of
-   course.) In the absence of either, the configure script will
-   automatically construct a Makefile which builds only the
-   command-line utilities; you can manually create this condition by
-   giving configure the option '--without-gtk'.
+ - For the graphical utilities, any of Gtk+-1.2, Gtk+-2.0, and Gtk+-3.0
+   should be supported. If you have more than one installed, you can
+   manually specify which one you want by giving the option
+   '--with-gtk=N' to the configure script where N is 1, 2, or 3.
+   (The default is the newest available, of course.) In the absence
+   of any Gtk version, the configure script will automatically
+   construct a Makefile which builds only the command-line utilities;
+   you can manually create this condition by giving configure the
+   option '--without-gtk'.
 
  - pterm would like to be setuid or setgid, as appropriate, to permit
    it to write records of user logins to /var/run/utmp and