diff --git a/sys/amd64/conf/GENERIC b/sys/amd64/conf/GENERIC
--- a/sys/amd64/conf/GENERIC
+++ b/sys/amd64/conf/GENERIC
@@ -67,6 +67,7 @@
 options 	COMPAT_FREEBSD10	# Compatible with FreeBSD10
 options 	COMPAT_FREEBSD11	# Compatible with FreeBSD11
 options 	COMPAT_FREEBSD12	# Compatible with FreeBSD12
+options 	COMPAT_FREEBSD13	# Compatible with FreeBSD13
 options 	SCSI_DELAY=5000		# Delay (in ms) before probing SCSI
 options 	KTRACE			# ktrace(1) support
 options 	STACK			# stack(9) support
diff --git a/sys/amd64/conf/MINIMAL b/sys/amd64/conf/MINIMAL
--- a/sys/amd64/conf/MINIMAL
+++ b/sys/amd64/conf/MINIMAL
@@ -61,6 +61,7 @@
 options 	COMPAT_FREEBSD10	# Compatible with FreeBSD10
 options 	COMPAT_FREEBSD11	# Compatible with FreeBSD11
 options 	COMPAT_FREEBSD12	# Compatible with FreeBSD12
+options 	COMPAT_FREEBSD13	# Compatible with FreeBSD13
 options 	SCSI_DELAY=5000		# Delay (in ms) before probing SCSI
 options 	KTRACE			# ktrace(1) support
 options 	STACK			# stack(9) support
diff --git a/sys/arm/conf/std.armv6 b/sys/arm/conf/std.armv6
--- a/sys/arm/conf/std.armv6
+++ b/sys/arm/conf/std.armv6
@@ -52,6 +52,7 @@
 options 	COMPAT_FREEBSD10	# Compatible with FreeBSD10
 options 	COMPAT_FREEBSD11	# Compatible with FreeBSD11
 options 	COMPAT_FREEBSD12	# Compatible with FreeBSD12
+options 	COMPAT_FREEBSD13	# Compatible with FreeBSD13
 
 # DTrace support
 options 	KDTRACE_HOOKS		# Kernel DTrace hooks
diff --git a/sys/arm/conf/std.armv7 b/sys/arm/conf/std.armv7
--- a/sys/arm/conf/std.armv7
+++ b/sys/arm/conf/std.armv7
@@ -52,6 +52,7 @@
 options 	COMPAT_FREEBSD10	# Compatible with FreeBSD10
 options 	COMPAT_FREEBSD11	# Compatible with FreeBSD11
 options 	COMPAT_FREEBSD12	# Compatible with FreeBSD12
+options 	COMPAT_FREEBSD13	# Compatible with FreeBSD13
 
 # DTrace support
 options 	KDTRACE_HOOKS		# Kernel DTrace hooks
diff --git a/sys/arm64/conf/std.arm64 b/sys/arm64/conf/std.arm64
--- a/sys/arm64/conf/std.arm64
+++ b/sys/arm64/conf/std.arm64
@@ -43,6 +43,7 @@
 options 	COMPAT_FREEBSD32	# Compatible with FreeBSD/arm
 options 	COMPAT_FREEBSD11	# Compatible with FreeBSD11
 options 	COMPAT_FREEBSD12	# Compatible with FreeBSD12
+options 	COMPAT_FREEBSD13	# Compatible with FreeBSD13
 options 	SCSI_DELAY=5000		# Delay (in ms) before probing SCSI
 options 	KTRACE			# ktrace(1) support
 options 	STACK			# stack(9) support
diff --git a/sys/conf/NOTES b/sys/conf/NOTES
--- a/sys/conf/NOTES
+++ b/sys/conf/NOTES
@@ -365,6 +365,9 @@
 # Enable FreeBSD12 compatibility syscalls
 options 	COMPAT_FREEBSD12
 
+# Enable FreeBSD13 compatibility syscalls
+options 	COMPAT_FREEBSD13
+
 # Enable Linux Kernel Programming Interface
 options 	COMPAT_LINUXKPI
 
diff --git a/sys/conf/options b/sys/conf/options
--- a/sys/conf/options
+++ b/sys/conf/options
@@ -100,6 +100,7 @@
 COMPAT_FREEBSD10	opt_global.h
 COMPAT_FREEBSD11	opt_global.h
 COMPAT_FREEBSD12	opt_global.h
+COMPAT_FREEBSD13	opt_global.h
 COMPAT_LINUXKPI	opt_dontuse.h
 _COMPAT_LINUX32	opt_compat.h	# XXX: make sure opt_compat.h exists
 COMPILING_LINT	opt_global.h
diff --git a/sys/i386/conf/GENERIC b/sys/i386/conf/GENERIC
--- a/sys/i386/conf/GENERIC
+++ b/sys/i386/conf/GENERIC
@@ -62,6 +62,7 @@
 options 	COMPAT_FREEBSD10	# Compatible with FreeBSD10
 options 	COMPAT_FREEBSD11	# Compatible with FreeBSD11
 options 	COMPAT_FREEBSD12	# Compatible with FreeBSD12
+options 	COMPAT_FREEBSD13	# Compatible with FreeBSD13
 options 	SCSI_DELAY=5000		# Delay (in ms) before probing SCSI
 options 	KTRACE			# ktrace(1) support
 options 	STACK			# stack(9) support
diff --git a/sys/i386/conf/MINIMAL b/sys/i386/conf/MINIMAL
--- a/sys/i386/conf/MINIMAL
+++ b/sys/i386/conf/MINIMAL
@@ -61,6 +61,7 @@
 options 	COMPAT_FREEBSD10	# Compatible with FreeBSD10
 options 	COMPAT_FREEBSD11	# Compatible with FreeBSD11
 options 	COMPAT_FREEBSD12	# Compatible with FreeBSD12
+options 	COMPAT_FREEBSD13	# Compatible with FreeBSD13
 options 	SCSI_DELAY=5000		# Delay (in ms) before probing SCSI
 options 	KTRACE			# ktrace(1) support
 options 	STACK			# stack(9) support
diff --git a/sys/mips/conf/JZ4780 b/sys/mips/conf/JZ4780
--- a/sys/mips/conf/JZ4780
+++ b/sys/mips/conf/JZ4780
@@ -32,6 +32,7 @@
 options 	COMPAT_FREEBSD10
 options 	COMPAT_FREEBSD11
 options 	COMPAT_FREEBSD12
+options 	COMPAT_FREEBSD13
 
 options 	SCHED_4BSD		#4BSD scheduler
 options 	INET			#InterNETworking
diff --git a/sys/mips/conf/X1000 b/sys/mips/conf/X1000
--- a/sys/mips/conf/X1000
+++ b/sys/mips/conf/X1000
@@ -30,6 +30,7 @@
 options 	COMPAT_FREEBSD10
 options 	COMPAT_FREEBSD11
 options 	COMPAT_FREEBSD12
+options 	COMPAT_FREEBSD13
 
 options 	SCHED_4BSD		#4BSD scheduler
 options 	INET			#InterNETworking
diff --git a/sys/mips/conf/std.BERI b/sys/mips/conf/std.BERI
--- a/sys/mips/conf/std.BERI
+++ b/sys/mips/conf/std.BERI
@@ -32,6 +32,7 @@
 options 	COMPAT_FREEBSD10
 options 	COMPAT_FREEBSD11
 options 	COMPAT_FREEBSD12
+options 	COMPAT_FREEBSD13
 
 options 	INTRNG
 options 	SCHED_ULE
diff --git a/sys/powerpc/conf/GENERIC b/sys/powerpc/conf/GENERIC
--- a/sys/powerpc/conf/GENERIC
+++ b/sys/powerpc/conf/GENERIC
@@ -69,6 +69,7 @@
 options 	COMPAT_FREEBSD10	# Compatible with FreeBSD10
 options 	COMPAT_FREEBSD11	# Compatible with FreeBSD11
 options 	COMPAT_FREEBSD12	# Compatible with FreeBSD12
+options 	COMPAT_FREEBSD13	# Compatible with FreeBSD13
 options 	SCSI_DELAY=5000		#Delay (in ms) before probing SCSI 
 options 	KTRACE			#ktrace(1) syscall trace support
 options 	STACK			#stack(9) support
diff --git a/sys/powerpc/conf/GENERIC64 b/sys/powerpc/conf/GENERIC64
--- a/sys/powerpc/conf/GENERIC64
+++ b/sys/powerpc/conf/GENERIC64
@@ -76,6 +76,7 @@
 options 	COMPAT_FREEBSD10	# Compatible with FreeBSD10
 options 	COMPAT_FREEBSD11	# Compatible with FreeBSD11
 options 	COMPAT_FREEBSD12	# Compatible with FreeBSD12
+options 	COMPAT_FREEBSD13	# Compatible with FreeBSD13
 options 	SCSI_DELAY=5000		#Delay (in ms) before probing SCSI 
 options 	KTRACE			#ktrace(1) syscall trace support
 options 	STACK			#stack(9) support
diff --git a/sys/powerpc/conf/GENERIC64LE b/sys/powerpc/conf/GENERIC64LE
--- a/sys/powerpc/conf/GENERIC64LE
+++ b/sys/powerpc/conf/GENERIC64LE
@@ -68,6 +68,7 @@
 #options 	COMPAT_FREEBSD32	#Compatible with FreeBSD/powerpcle binaries
 options		COMPAT_FREEBSD11	# Compatible with FreeBSD11
 options		COMPAT_FREEBSD12	# Compatible with FreeBSD12
+options 	COMPAT_FREEBSD13	# Compatible with FreeBSD13
 options 	SCSI_DELAY=5000		#Delay (in ms) before probing SCSI 
 options 	KTRACE			#ktrace(1) syscall trace support
 options 	STACK			#stack(9) support
diff --git a/sys/powerpc/conf/MPC85XX b/sys/powerpc/conf/MPC85XX
--- a/sys/powerpc/conf/MPC85XX
+++ b/sys/powerpc/conf/MPC85XX
@@ -61,6 +61,7 @@
 options 	COMPAT_FREEBSD10
 options 	COMPAT_FREEBSD11
 options 	COMPAT_FREEBSD12
+options 	COMPAT_FREEBSD13
 options 	HWPMC_HOOKS
 options 	KDTRACE_HOOKS		# Kernel DTrace hooks
 options 	DDB_CTF			# Kernel ELF linker loads CTF data
diff --git a/sys/powerpc/conf/MPC85XXSPE b/sys/powerpc/conf/MPC85XXSPE
--- a/sys/powerpc/conf/MPC85XXSPE
+++ b/sys/powerpc/conf/MPC85XXSPE
@@ -62,6 +62,7 @@
 options 	COMPAT_FREEBSD10
 options 	COMPAT_FREEBSD11
 options 	COMPAT_FREEBSD12
+options 	COMPAT_FREEBSD13
 options 	HWPMC_HOOKS
 options 	KDTRACE_HOOKS		# Kernel DTrace hooks
 options 	DDB_CTF			# Kernel ELF linker loads CTF data
diff --git a/sys/riscv/conf/GENERIC b/sys/riscv/conf/GENERIC
--- a/sys/riscv/conf/GENERIC
+++ b/sys/riscv/conf/GENERIC
@@ -53,6 +53,7 @@
 options 	GEOM_RAID		# Soft RAID functionality.
 options 	GEOM_LABEL		# Provides labelization
 options 	COMPAT_FREEBSD12	# Compatible with FreeBSD12
+options 	COMPAT_FREEBSD13	# Compatible with FreeBSD13
 options 	SCSI_DELAY=5000		# Delay (in ms) before probing SCSI
 options 	KTRACE			# ktrace(1) support
 options 	STACK			# stack(9) support