diff --git a/sys/netinet/tcp_log_buf.h b/sys/netinet/tcp_log_buf.h
--- a/sys/netinet/tcp_log_buf.h
+++ b/sys/netinet/tcp_log_buf.h
@@ -60,14 +60,6 @@
 	uint8_t		_pad[4];
 } ALIGN_TCP_LOG;
 
-/* Internal RACK state variables. */
-struct tcp_log_rack
-{
-	uint32_t	tlr_rack_rtt;		/* rc_rack_rtt */
-	uint8_t		tlr_state;		/* Internal RACK state */
-	uint8_t		_pad[3];		/* Padding */
-};
-
 struct tcp_log_bbr {
 	uint64_t cur_del_rate;
 	uint64_t delRate;
@@ -126,7 +118,6 @@
  */
 union tcp_log_stackspecific
 {
-	struct tcp_log_rack u_rack;
 	struct tcp_log_bbr u_bbr;
 	struct tcp_log_sendfile u_sf;
 	struct tcp_log_raw u_raw;	/* "raw" log access */
@@ -185,7 +176,6 @@
 	uint8_t		_pad[3];	/* Padding */
 	/* Per-stack info */
 	union tcp_log_stackspecific tlb_stackinfo;
-#define	tlb_rack	tlb_stackinfo.u_rack
 
 	/* The packet */
 	uint32_t	tlb_len;	/* The packet's data length */