diff --git a/doc/README b/doc/README
index d965801f6..8c2c52243 100644
--- a/doc/README
+++ b/doc/README
@@ -30,8 +30,9 @@ This software is under BSD license, see LICENSE for details.
 	This improves randomization and spoof resistance. For the default 
 	of 16 ports the builtin alternative works well.
   * --without-pthreads 
-	This disables pthreads, and uses Solaris thr library or no threading. 
-	Without this option the pthreads library is detected automatically.
+	This disables pthreads. Without this option the pthreads library 
+	is detected automatically. Use this option to disable threading
+	altogether, or, on Solaris, also use --with(out)-solaris-threads.
   * --enable-static-exe
 	This enables a debug option to statically link, against ldns and 
 	libevent libraries.