Index: head/sys/netinet/tcp_seq.h
===================================================================
--- head/sys/netinet/tcp_seq.h
+++ head/sys/netinet/tcp_seq.h
@@ -47,10 +47,10 @@
 #define	SEQ_MIN(a, b)	((SEQ_LT(a, b)) ? (a) : (b))
 #define	SEQ_MAX(a, b)	((SEQ_GT(a, b)) ? (a) : (b))
 
-#define	WIN_LT(a,b)	((short)(ntohs(a)-ntohs(b)) < 0)
-#define	WIN_LEQ(a,b)	((short)(ntohs(a)-ntohs(b)) <= 0)
-#define	WIN_GT(a,b)	((short)(ntohs(a)-ntohs(b)) > 0)
-#define	WIN_GEQ(a,b)	((short)(ntohs(a)-ntohs(b)) >= 0)
+#define	WIN_LT(a,b)	(ntohs(a) < ntohs(b))
+#define	WIN_LEQ(a,b)	(ntohs(a) <= ntohs(b))
+#define	WIN_GT(a,b)	(ntohs(a) > ntohs(b))
+#define	WIN_GEQ(a,b)	(ntohs(a) >= ntohs(b))
 
 #define	WIN_MIN(a, b)	((WIN_LT(a, b)) ? (a) : (b))
 #define	WIN_MAX(a, b)	((WIN_GT(a, b)) ? (a) : (b))