diff --git a/share/man/man5/src.conf.5 b/share/man/man5/src.conf.5
--- a/share/man/man5/src.conf.5
+++ b/share/man/man5/src.conf.5
@@ -641,8 +641,6 @@
 .Pa /usr/share/examples/ .
 .It Va WITH_EXPERIMENTAL
 Include experimental features in the build.
-.It Va WITH_EXTRA_TCP_STACKS
-Build extra TCP stack modules.
 .It Va WITHOUT_FDT
 Do not build Flattened Device Tree support as part of the base system.
 This includes the device tree compiler (dtc) and libfdt support library.
diff --git a/sys/conf/NOTES b/sys/conf/NOTES
--- a/sys/conf/NOTES
+++ b/sys/conf/NOTES
@@ -681,7 +681,6 @@
 options  	TCP_RFC7413		# TCP Fast Open
 
 options  	TCPHPTS
-makeoptions	WITH_EXTRA_TCP_STACKS=1	# RACK and BBR TCP kernel modules
 
 # In order to enable IPSEC you MUST also add device crypto to 
 # your kernel configuration
@@ -693,6 +692,9 @@
 options 	IPSEC_SUPPORT
 #options 	IPSEC_DEBUG		#debug for IP security
 
+# Alternative TCP stacks
+options 	TCP_BBR
+options 	TCP_RACK
 
 # TLS framing and encryption/decryption of data over TCP sockets.
 options 	KERN_TLS		# TLS transmit and receive offload
diff --git a/sys/conf/files b/sys/conf/files
--- a/sys/conf/files
+++ b/sys/conf/files
@@ -4361,6 +4361,13 @@
 	compile-with "${NORMAL_C} ${NO_WNONNULL}"
 netinet/tcp_reass.c		optional inet | inet6
 netinet/tcp_sack.c		optional inet | inet6
+netinet/tcp_stacks/bbr.c	optional inet tcp_bbr | inet6 tcp_bbr \
+	compile-with "${NORMAL_C} -DMODNAME=tcp_bbr -DSTACKNAME=bbr"
+netinet/tcp_stacks/rack.c	optional inet tcp_bbr | inet6 tcp_bbr \
+	compile-with "${NORMAL_C} -DMODNAME=tcp_rack -DSTACKNAME=rack"
+netinet/tcp_stacks/rack_bbr_common.c	optional inet tcp_bbr | inet tcp_rack | inet6 tcp_bbr | inet6 tcp_rack
+netinet/tcp_stacks/sack_filter.c	optional inet tcp_bbr | inet tcp_rack | inet6 tcp_bbr | inet6 tcp_rack
+netinet/tcp_stacks/tailq_hash.c	optional inet tcp_bbr | inet tcp_rack | inet6 tcp_bbr | inet6 tcp_rack
 netinet/tcp_stats.c		optional stats inet | stats inet6
 netinet/tcp_subr.c		optional inet | inet6
 netinet/tcp_syncache.c		optional inet | inet6
diff --git a/sys/conf/kern.opts.mk b/sys/conf/kern.opts.mk
--- a/sys/conf/kern.opts.mk
+++ b/sys/conf/kern.opts.mk
@@ -56,7 +56,6 @@
 
 __DEFAULT_NO_OPTIONS = \
     BHYVE_SNAPSHOT \
-    EXTRA_TCP_STACKS \
     KERNEL_RETPOLINE \
     RATELIMIT \
     REPRODUCIBLE_BUILD \
diff --git a/sys/conf/kern.post.mk b/sys/conf/kern.post.mk
--- a/sys/conf/kern.post.mk
+++ b/sys/conf/kern.post.mk
@@ -33,10 +33,6 @@
 MKMODULESENV+=	WITH_CTF="${WITH_CTF}"
 .endif
 
-.if defined(WITH_EXTRA_TCP_STACKS)
-MKMODULESENV+=	WITH_EXTRA_TCP_STACKS="${WITH_EXTRA_TCP_STACKS}"
-.endif
-
 .if !empty(KCSAN_ENABLED)
 MKMODULESENV+=	KCSAN_ENABLED="yes"
 .endif
diff --git a/sys/conf/options b/sys/conf/options
--- a/sys/conf/options
+++ b/sys/conf/options
@@ -231,6 +231,8 @@
 TCPHPTS         opt_inet.h
 TCP_REQUEST_TRK opt_global.h
 TCP_ACCOUNTING	opt_global.h
+TCP_BBR		opt_inet.h
+TCP_RACK	opt_inet.h
 #
 # TCP SaD Detection is an experimental Sack attack Detection (SaD)
 # algorithm that uses "normal" behaviour with SACK's to detect
diff --git a/sys/modules/tcp/Makefile b/sys/modules/tcp/Makefile
--- a/sys/modules/tcp/Makefile
+++ b/sys/modules/tcp/Makefile
@@ -8,13 +8,10 @@
         ${_tcp_rack} \
 	${_tcpmd5} \
 
-.if ${MK_EXTRA_TCP_STACKS} != "no" || defined(ALL_MODULES)
-_tcp_bbr= 	bbr
-_tcp_rack= 	rack
-.endif
-
 .if (${MK_INET_SUPPORT} != "no" || ${MK_INET6_SUPPORT} != "no") || \
 	defined(ALL_MODULES)
+_tcp_bbr= 	bbr
+_tcp_rack= 	rack
 .if ${KERN_OPTS:MIPSEC_SUPPORT} && !${KERN_OPTS:MTCP_SIGNATURE}
 _tcpmd5=	tcpmd5
 .endif