diff --git a/unix/vncviewer/vncviewer.cxx b/unix/vncviewer/vncviewer.cxx
index 9edb80d..f3a5e01 100644
--- a/unix/vncviewer/vncviewer.cxx
+++ b/unix/vncviewer/vncviewer.cxx
@@ -33,6 +33,7 @@
 #include <locale.h>
 #include <os/os.h>
 #include <rfb/Logger_stdio.h>
+#include <rfb/SecurityClient.h>
 #include <rfb/LogWriter.h>
 #include <network/TcpSocket.h>
 #include "TXWindow.h"
@@ -278,6 +279,8 @@
 				 "Copyright (C) 2004-2009 Peter Astrand for Cendio AB\n"
 				 "See http://www.tigervnc.org for information on TigerVNC.");
 
+  rfb::SecurityClient::setDefaults();
+
   // Write about text to console, still using normal locale codeset
   snprintf(aboutText, sizeof(aboutText),
 	   gettext(englishAbout), PACKAGE_VERSION, buildtime);