--- network-manager-vpnc-0.6.4svn2422.orig/src/nm-vpnc-service.c
+++ network-manager-vpnc-0.6.4svn2422/src/nm-vpnc-service.c
@@ -379,6 +379,7 @@
 	g_ptr_array_add (vpnc_argv, (gpointer) (*vpnc_binary));
 	g_ptr_array_add (vpnc_argv, (gpointer) "--non-inter");
 	g_ptr_array_add (vpnc_argv, (gpointer) "--no-detach");
+	g_ptr_array_add (vpnc_argv, (gpointer) "--enable-no-encryption");
 	g_ptr_array_add (vpnc_argv, (gpointer) "-");
 	g_ptr_array_add (vpnc_argv, NULL);