diff --git a/sys/netinet/cc/cc.h b/sys/netinet/cc/cc.h
--- a/sys/netinet/cc/cc.h
+++ b/sys/netinet/cc/cc.h
@@ -104,10 +104,10 @@
 #define	CCF_ACKNOW		0x0008	/* Will this ack be sent now? */
 #define	CCF_IPHDR_CE		0x0010	/* Does this packet set CE bit? */
 #define	CCF_TCPHDR_CWR		0x0020	/* Does this packet set CWR bit? */
-#define	CCF_MAX_CWND		0x0040	/* Have we reached maximum cwnd? */
-#define	CCF_CHG_MAX_CWND	0x0080	/* CUBIC max_cwnd changed, for K */
-#define	CCF_USR_IWND		0x0100	/* User specified initial window */
-#define	CCF_USR_IWND_INIT_NSEG	0x0200	/* Convert segs to bytes on conn init */
+#define	CCF_UNUSED1		0x0040
+#define	CCF_UNUSED2		0x0080
+#define	CCF_UNUSED3		0x0100
+#define	CCF_UNUSED4		0x0200
 #define CCF_HYSTART_ALLOWED	0x0400	/* If the CC supports it Hystart is allowed */
 #define CCF_HYSTART_CAN_SH_CWND	0x0800  /* Can hystart when going CSS -> CA slam the cwnd */
 #define CCF_HYSTART_CONS_SSTH	0x1000	/* Should hystart use the more conservative ssthresh */