diff --git a/Makefile.inc1 b/Makefile.inc1
index f0632112797f..110d3ecb20bd 100644
--- a/Makefile.inc1
+++ b/Makefile.inc1
@@ -126,9 +126,9 @@ TARGET_ABI=	gnueabi
 .endif
 .endif
 MACHINE_ABI?=	unknown
-MACHINE_TRIPLE?=${MACHINE_ARCH:S/amd64/x86_64/:C/hf$//:S/mipsn32/mips64/}-${MACHINE_ABI}-freebsd12.0
+MACHINE_TRIPLE?=${MACHINE_ARCH:S/amd64/x86_64/:C/hf$//:S/mipsn32/mips64/}-${MACHINE_ABI}-freebsd13.0
 TARGET_ABI?=	unknown
-TARGET_TRIPLE?=	${TARGET_ARCH:S/amd64/x86_64/:C/hf$//:S/mipsn32/mips64/}-${TARGET_ABI}-freebsd12.0
+TARGET_TRIPLE?=	${TARGET_ARCH:S/amd64/x86_64/:C/hf$//:S/mipsn32/mips64/}-${TARGET_ABI}-freebsd13.0
 KNOWN_ARCHES?=	aarch64/arm64 \
 		amd64 \
 		arm \
diff --git a/UPDATING b/UPDATING
index bc0e4879d9d8..f1bc3c69208c 100644
--- a/UPDATING
+++ b/UPDATING
@@ -16,8 +16,8 @@ from older versions of FreeBSD, try WITHOUT_CLANG and WITH_GCC to bootstrap to
 the tip of head, and then rebuild without this option. The bootstrap process
 from older version of current across the gcc/clang cutover is a bit fragile.
 
-NOTE TO PEOPLE WHO THINK THAT FreeBSD 12.x IS SLOW:
-	FreeBSD 12.x has many debugging features turned on, in both the kernel
+NOTE TO PEOPLE WHO THINK THAT FreeBSD 13.x IS SLOW:
+	FreeBSD 13.x has many debugging features turned on, in both the kernel
 	and userland.  These features attempt to detect incorrect use of
 	system primitives, and encourage loud failure through extra sanity
 	checking and fail stop semantics.  They also substantially impact
diff --git a/contrib/gcc/config.gcc b/contrib/gcc/config.gcc
index e452dfed6fd3..429f8cba40ca 100644
--- a/contrib/gcc/config.gcc
+++ b/contrib/gcc/config.gcc
@@ -434,6 +434,8 @@ case ${target} in
       tm_defines="${tm_defines} FBSD_MAJOR=11" ;;
     *-*-freebsd12 | *-*-freebsd12.*)
       tm_defines="${tm_defines} FBSD_MAJOR=12" ;;
+    *-*-freebsd13 | *-*-freebsd13.*)
+      tm_defines="${tm_defines} FBSD_MAJOR=13" ;;
     *)
       echo 'Please update *-*-freebsd* in gcc/config.gcc'
       exit 1
diff --git a/gnu/usr.bin/cc/cc_tools/freebsd-native.h b/gnu/usr.bin/cc/cc_tools/freebsd-native.h
index 7e11bd83537c..375c62f4aa28 100644
--- a/gnu/usr.bin/cc/cc_tools/freebsd-native.h
+++ b/gnu/usr.bin/cc/cc_tools/freebsd-native.h
@@ -7,8 +7,8 @@
 #define FREEBSD_NATIVE 1
 
 /* Fake out gcc/config/freebsd<version>.h.  */
-#define	FBSD_MAJOR	12
-#define	FBSD_CC_VER	1200001		/* form like __FreeBSD_version */
+#define	FBSD_MAJOR	13
+#define	FBSD_CC_VER	1300000		/* form like __FreeBSD_version */
 
 #undef SYSTEM_INCLUDE_DIR		/* We don't need one for now. */
 #undef TOOL_INCLUDE_DIR			/* We don't need one for now. */
diff --git a/lib/clang/freebsd_cc_version.h b/lib/clang/freebsd_cc_version.h
index 9096dc913f14..68bad5a453e7 100644
--- a/lib/clang/freebsd_cc_version.h
+++ b/lib/clang/freebsd_cc_version.h
@@ -1,3 +1,3 @@
 /* $FreeBSD$ */
 
-#define	FREEBSD_CC_VERSION		1200016
+#define	FREEBSD_CC_VERSION		1300000
diff --git a/lib/clang/llvm.build.mk b/lib/clang/llvm.build.mk
index 920c79bb11ae..91b4e4d83aba 100644
--- a/lib/clang/llvm.build.mk
+++ b/lib/clang/llvm.build.mk
@@ -17,7 +17,7 @@ CFLAGS+=	-I${LLVM_SRCS}/include
 CFLAGS+=	-DLLVM_BUILD_GLOBAL_ISEL
 CFLAGS+=	-D__STDC_LIMIT_MACROS
 CFLAGS+=	-D__STDC_CONSTANT_MACROS
-#CFLAGS+=	-DNDEBUG
+CFLAGS+=	-DNDEBUG
 
 TARGET_ARCH?=	${MACHINE_ARCH}
 BUILD_ARCH?=	${MACHINE_ARCH}
@@ -33,7 +33,7 @@ TARGET_ABI=	-gnueabi
 TARGET_ABI=
 .endif
 VENDOR=		unknown
-OS_VERSION=	freebsd12.0
+OS_VERSION=	freebsd13.0
 
 LLVM_TARGET_TRIPLE?=	${TARGET_ARCH:C/amd64/x86_64/:C/arm64/aarch64/}-${VENDOR}-${OS_VERSION}${TARGET_ABI}
 LLVM_BUILD_TRIPLE?=	${BUILD_ARCH:C/amd64/x86_64/:C/arm64/aarch64/}-${VENDOR}-${OS_VERSION}
diff --git a/release/Makefile b/release/Makefile
index d563825e2376..c4bbb1e5ae84 100644
--- a/release/Makefile
+++ b/release/Makefile
@@ -210,7 +210,6 @@ disc1: packagesystem
 	ln -fs /tmp/bsdinstall_etc/resolv.conf ${.TARGET}/etc/resolv.conf
 	echo sendmail_enable=\"NONE\" > ${.TARGET}/etc/rc.conf
 	echo hostid_enable=\"NO\" >> ${.TARGET}/etc/rc.conf
-	echo debug.witness.trace=0 >> ${.TARGET}/etc/sysctl.conf
 	echo vfs.mountroot.timeout=\"10\" >> ${.TARGET}/boot/loader.conf
 	echo kernels_autodetect=\"NO\" >> ${.TARGET}/boot/loader.conf
 	cp ${.CURDIR}/rc.local ${.TARGET}/etc
@@ -238,7 +237,6 @@ bootonly: packagesystem
 	ln -fs /tmp/bsdinstall_etc/resolv.conf ${.TARGET}/etc/resolv.conf
 	echo sendmail_enable=\"NONE\" > ${.TARGET}/etc/rc.conf
 	echo hostid_enable=\"NO\" >> ${.TARGET}/etc/rc.conf
-	echo debug.witness.trace=0 >> ${.TARGET}/etc/sysctl.conf
 	echo vfs.mountroot.timeout=\"10\" >> ${.TARGET}/boot/loader.conf
 	echo kernels_autodetect=\"NO\" >> ${.TARGET}/boot/loader.conf
 	cp ${.CURDIR}/rc.local ${.TARGET}/etc
@@ -263,7 +261,6 @@ dvd: packagesystem
 	ln -fs /tmp/bsdinstall_etc/resolv.conf ${.TARGET}/etc/resolv.conf
 	echo sendmail_enable=\"NONE\" > ${.TARGET}/etc/rc.conf
 	echo hostid_enable=\"NO\" >> ${.TARGET}/etc/rc.conf
-	echo debug.witness.trace=0 >> ${.TARGET}/etc/sysctl.conf
 	echo vfs.mountroot.timeout=\"10\" >> ${.TARGET}/boot/loader.conf
 	echo kernels_autodetect=\"NO\" >> ${.TARGET}/boot/loader.conf
 	cp ${.CURDIR}/rc.local ${.TARGET}/etc
diff --git a/sys/conf/newvers.sh b/sys/conf/newvers.sh
index d585972b9c77..120b96473166 100644
--- a/sys/conf/newvers.sh
+++ b/sys/conf/newvers.sh
@@ -45,8 +45,8 @@
 #                      included if the tree is modified.
 
 TYPE="FreeBSD"
-REVISION="12.0"
-BRANCH="ALPHA10"
+REVISION="13.0"
+BRANCH="CURRENT"
 if [ -n "${BRANCH_OVERRIDE}" ]; then
 	BRANCH=${BRANCH_OVERRIDE}
 fi
diff --git a/sys/sys/param.h b/sys/sys/param.h
index 916afc93ec89..3d77aa945c10 100644
--- a/sys/sys/param.h
+++ b/sys/sys/param.h
@@ -60,7 +60,7 @@
  *		in the range 5 to 9.
  */
 #undef __FreeBSD_version
-#define __FreeBSD_version 1200085	/* Master, propagated to newvers */
+#define __FreeBSD_version 1300000	/* Master, propagated to newvers */
 
 /*
  * __FreeBSD_kernel__ indicates that this system uses the kernel of FreeBSD,