--- a/check_varnish/src/check_varnish.c
+++ b/check_varnish/src/check_varnish.c
@@ -51,6 +51,10 @@
 #include "varnishapi.h"
 #endif
 
+#if !defined(VSC_ARGS)
+#define VSC_ARGS    "f:n:N:"
+#endif
+
 static int verbose = 0;
 
 struct range {
