diff --git a/INSTALL b/INSTALL
index 6834462e0..19c0ce2c3 100644
--- a/INSTALL
+++ b/INSTALL
@@ -146,17 +146,18 @@ Special features/options:
 	DIR is the base directory containing the compiled FWTK package
 	(or at least the library and header files).
 
-  --with-kerb4
-	Enable Kerberos IV support.  Tested only with the Cygnus Network
-	Security package (CNS).  This uses Kerberos passphrases for
-	authentication but does not use the Kerberos cookie scheme.
+  --with-kerb4[=DIR]
+        Enable Kerberos IV support.  If specified, DIR is the base
+        directory containing the Kerberos IV include and lib dirs.
+        This uses Kerberos passphrases for authentication but does
+        not use the Kerberos cookie scheme.
 
-  --with-kerb5
-	Enable Kerberos V support.  Tested against MIT Kerberos V,
-	release 1.1, although also expected to work against CNS.  This
-	This uses Kerberos passphrases for authentication but does not
-	use the Kerberos cookie scheme.  Will not work for Kerberos V
-	older than version 1.1.
+  --with-kerb5[=DIR]
+        Enable Kerberos V support.  If specified, DIR is the base
+        directory containing the Kerberos V include and lib dirs.
+        This This uses Kerberos passphrases for authentication but
+        does not use the Kerberos cookie scheme.  Will not work for
+        Kerberos V older than version 1.1.
 
   --with-authenticate
 	Enable support for the AIX 4.x general authentication function.