--- nessus/Makefile.orig	2008-04-27 10:55:40.000000000 +0900
+++ nessus/Makefile	2008-04-27 10:56:19.000000000 +0900
@@ -12,7 +12,7 @@
 NESSUSCLIENT=OpenVAS-Client
 
 # Add some specific Windows compile options for Cygwin
-SYSTEM:=$(shell uname -o)
+SYSTEM:=$(shell uname -s)
 ifeq ($(SYSTEM), Cygwin)
 CFLAGS+=-mms-bitfields
 LDFLAGS+=-mwindows