diff --git a/include/unistd.h b/include/unistd.h
--- a/include/unistd.h
+++ b/include/unistd.h
@@ -463,12 +463,10 @@
 #endif /* __XSI_VISIBLE */
 
 #if (__XSI_VISIBLE && __XSI_VISIBLE <= 500) || __BSD_VISIBLE
-int	 brk(const void *);
 int	 chroot(const char *);
 int	 getdtablesize(void);
 int	 getpagesize(void) __pure2;
 char	*getpass(const char *);
-void	*sbrk(intptr_t);
 #endif
 
 #if (__XSI_VISIBLE && __XSI_VISIBLE <= 600) || __BSD_VISIBLE
diff --git a/lib/libc/amd64/Symbol.map b/lib/libc/amd64/Symbol.map
--- a/lib/libc/amd64/Symbol.map
+++ b/lib/libc/amd64/Symbol.map
@@ -18,8 +18,6 @@
 	amd64_get_gsbase;
 	amd64_set_fsbase;
 	amd64_set_gsbase;
-	brk;
-	sbrk;
 };
 
 FBSD_1.6 {
@@ -43,6 +41,5 @@
 	__signalcontext;
 	signalcontext;
 	__siglongjmp;
-	_brk;
 	_vfork;
 };
diff --git a/lib/libc/arm/Symbol.map b/lib/libc/arm/Symbol.map
--- a/lib/libc/arm/Symbol.map
+++ b/lib/libc/arm/Symbol.map
@@ -6,8 +6,6 @@
 FBSD_1.0 {
 	__mcount;
 	alloca;
-	brk;
-	sbrk;
 };
 
 FBSD_1.3 {
@@ -35,8 +33,6 @@
 	_signalcontext;
 	__siglongjmp;
 	_vfork;
-	_brk;
-	_sbrk;
 
 	_libc_arm_fpu_present;
 };
diff --git a/lib/libc/i386/Symbol.map b/lib/libc/i386/Symbol.map
--- a/lib/libc/i386/Symbol.map
+++ b/lib/libc/i386/Symbol.map
@@ -8,7 +8,6 @@
 	alloca;
 	__flt_rounds;
 	rfork_thread;
-	brk;
 	i386_clr_watch;
 	i386_get_fsbase;
 	i386_get_gsbase;
@@ -20,7 +19,6 @@
 	i386_set_ldt;
 	i386_set_watch;
 	i386_vm86;
-	sbrk;
 	___tls_get_addr;
 };
 
@@ -41,5 +39,4 @@
 	signalcontext;
 	__siglongjmp;
 	_vfork;
-	_brk;
 };
diff --git a/lib/libc/powerpc/Symbol.map b/lib/libc/powerpc/Symbol.map
--- a/lib/libc/powerpc/Symbol.map
+++ b/lib/libc/powerpc/Symbol.map
@@ -11,8 +11,6 @@
 	fpgetsticky;
 	fpsetmask;
 	fpsetround;
-	brk;
-	sbrk;
 };
 
 FBSD_1.3 {
diff --git a/lib/libc/powerpc64/Symbol.map b/lib/libc/powerpc64/Symbol.map
--- a/lib/libc/powerpc64/Symbol.map
+++ b/lib/libc/powerpc64/Symbol.map
@@ -11,8 +11,6 @@
 	fpgetsticky;
 	fpsetmask;
 	fpsetround;
-	brk;
-	sbrk;
 };
 
 FBSDprivate_1.0 {
diff --git a/lib/libc/sys/brk.c b/lib/libc/sys/brk.c
--- a/lib/libc/sys/brk.c
+++ b/lib/libc/sys/brk.c
@@ -31,7 +31,11 @@
 #include <stdint.h>
 #include <stdlib.h>
 
-void *__sys_break(char *nsize);
+int __freebsd14__brk(const void *addr);
+int __freebsd14_brk(const void *addr);
+void *__freebsd14_sbrk(intptr_t incr);
+
+void *freebsd14_break(char *nsize);
 
 static uintptr_t curbrk, minbrk;
 static int curbrk_initted;
@@ -42,7 +46,7 @@
 	void *newbrk;
 
 	if (!curbrk_initted) {
-		newbrk = __sys_break(NULL);
+		newbrk = freebsd14_break(NULL);
 		if (newbrk == (void *)-1)
 			return (-1);
 		curbrk = minbrk = (uintptr_t)newbrk;
@@ -61,7 +65,7 @@
 		errno = EINVAL;
 		return ((void *)-1);
 	}
-	if (__sys_break(addr) == (void *)-1)
+	if (freebsd14_break(addr) == (void *)-1)
 		return ((void *)-1);
 	oldbrk = curbrk;
 	curbrk = (uintptr_t)addr;
@@ -69,7 +73,7 @@
 }
 
 int
-brk(const void *addr)
+__freebsd14_brk(const void *addr)
 {
 
 	if (initbrk() == -1)
@@ -80,7 +84,7 @@
 }
 
 int
-_brk(const void *addr)
+__freebsd14__brk(const void *addr)
 {
 
 	if (initbrk() == -1)
@@ -89,7 +93,7 @@
 }
 
 void *
-sbrk(intptr_t incr)
+__freebsd14_sbrk(intptr_t incr)
 {
 
 	if (initbrk() == -1)
@@ -102,3 +106,9 @@
 	}
 	return (mvbrk((void *)(curbrk + incr)));
 }
+
+#ifndef __powerpc__
+__sym_compat(_brk, __freebsd14_brk, FBSD_1.0);
+#endif
+__sym_compat(brk, __freebsd14_brk, FBSD_1.0);
+__sym_compat(sbrk, __freebsd14_sbrk, FBSD_1.0);
diff --git a/sys/compat/freebsd32/freebsd32_syscall.h b/sys/compat/freebsd32/freebsd32_syscall.h
--- a/sys/compat/freebsd32/freebsd32_syscall.h
+++ b/sys/compat/freebsd32/freebsd32_syscall.h
@@ -21,7 +21,7 @@
 #define	FREEBSD32_SYS_freebsd11_mknod	14
 #define	FREEBSD32_SYS_chmod	15
 #define	FREEBSD32_SYS_chown	16
-#define	FREEBSD32_SYS_break	17
+#define	FREEBSD32_SYS_freebsd14_break	17
 				/* 18 is freebsd4 freebsd32_getfsstat */
 				/* 19 is old freebsd32_lseek */
 #define	FREEBSD32_SYS_getpid	20
diff --git a/sys/compat/freebsd32/freebsd32_syscalls.c b/sys/compat/freebsd32/freebsd32_syscalls.c
--- a/sys/compat/freebsd32/freebsd32_syscalls.c
+++ b/sys/compat/freebsd32/freebsd32_syscalls.c
@@ -22,7 +22,7 @@
 	"compat11.mknod",		/* 14 = freebsd11 mknod */
 	"chmod",			/* 15 = chmod */
 	"chown",			/* 16 = chown */
-	"break",			/* 17 = break */
+	"compat14.break",		/* 17 = freebsd14 break */
 	"compat4.freebsd32_getfsstat",		/* 18 = freebsd4 freebsd32_getfsstat */
 	"compat.freebsd32_lseek",		/* 19 = old freebsd32_lseek */
 	"getpid",			/* 20 = getpid */
diff --git a/sys/compat/freebsd32/freebsd32_sysent.c b/sys/compat/freebsd32/freebsd32_sysent.c
--- a/sys/compat/freebsd32/freebsd32_sysent.c
+++ b/sys/compat/freebsd32/freebsd32_sysent.c
@@ -59,6 +59,12 @@
 #define compat13(n, name) .sy_narg = 0, .sy_call = (sy_call_t *)nosys
 #endif
 
+#ifdef COMPAT_FREEBSD14
+#define compat14(n, name) .sy_narg = n, .sy_call = (sy_call_t *)__CONCAT(freebsd14_, name)
+#else
+#define compat14(n, name) .sy_narg = 0, .sy_call = (sy_call_t *)nosys
+#endif
+
 /* The casts are bogus but will do for now. */
 struct sysent freebsd32_sysent[] = {
 	{ .sy_narg = 0, .sy_call = (sy_call_t *)nosys, .sy_auevent = AUE_NULL, .sy_flags = 0, .sy_thrcnt = SY_THR_STATIC },		/* 0 = syscall */
@@ -78,7 +84,7 @@
 	{ compat11(AS(freebsd11_mknod_args),mknod), .sy_auevent = AUE_MKNOD, .sy_flags = 0, .sy_thrcnt = SY_THR_STATIC },	/* 14 = freebsd11 mknod */
 	{ .sy_narg = AS(chmod_args), .sy_call = (sy_call_t *)sys_chmod, .sy_auevent = AUE_CHMOD, .sy_flags = 0, .sy_thrcnt = SY_THR_STATIC },	/* 15 = chmod */
 	{ .sy_narg = AS(chown_args), .sy_call = (sy_call_t *)sys_chown, .sy_auevent = AUE_CHOWN, .sy_flags = 0, .sy_thrcnt = SY_THR_STATIC },	/* 16 = chown */
-	{ .sy_narg = AS(break_args), .sy_call = (sy_call_t *)sys_break, .sy_auevent = AUE_NULL, .sy_flags = SYF_CAPENABLED, .sy_thrcnt = SY_THR_STATIC },	/* 17 = break */
+	{ compat14(AS(freebsd14_break_args),break), .sy_auevent = AUE_NULL, .sy_flags = SYF_CAPENABLED, .sy_thrcnt = SY_THR_STATIC },	/* 17 = freebsd14 break */
 	{ compat4(AS(freebsd4_freebsd32_getfsstat_args),freebsd32_getfsstat), .sy_auevent = AUE_GETFSSTAT, .sy_flags = 0, .sy_thrcnt = SY_THR_STATIC },	/* 18 = freebsd4 freebsd32_getfsstat */
 	{ compat(AS(ofreebsd32_lseek_args),freebsd32_lseek), .sy_auevent = AUE_LSEEK, .sy_flags = SYF_CAPENABLED, .sy_thrcnt = SY_THR_STATIC },	/* 19 = old freebsd32_lseek */
 	{ .sy_narg = 0, .sy_call = (sy_call_t *)sys_getpid, .sy_auevent = AUE_GETPID, .sy_flags = SYF_CAPENABLED, .sy_thrcnt = SY_THR_STATIC },	/* 20 = getpid */
diff --git a/sys/compat/freebsd32/freebsd32_systrace_args.c b/sys/compat/freebsd32/freebsd32_systrace_args.c
--- a/sys/compat/freebsd32/freebsd32_systrace_args.c
+++ b/sys/compat/freebsd32/freebsd32_systrace_args.c
@@ -121,13 +121,6 @@
 		*n_args = 3;
 		break;
 	}
-	/* break */
-	case 17: {
-		struct break_args *p = params;
-		uarg[a++] = (intptr_t)p->nsize; /* char * */
-		*n_args = 1;
-		break;
-	}
 	/* getpid */
 	case 20: {
 		*n_args = 0;
@@ -3532,16 +3525,6 @@
 			break;
 		};
 		break;
-	/* break */
-	case 17:
-		switch (ndx) {
-		case 0:
-			p = "userland char *";
-			break;
-		default:
-			break;
-		};
-		break;
 	/* getpid */
 	case 20:
 		break;
@@ -9142,11 +9125,6 @@
 		if (ndx == 0 || ndx == 1)
 			p = "int";
 		break;
-	/* break */
-	case 17:
-		if (ndx == 0 || ndx == 1)
-			p = "void *";
-		break;
 	/* getpid */
 	case 20:
 	/* mount */
diff --git a/sys/kern/init_sysent.c b/sys/kern/init_sysent.c
--- a/sys/kern/init_sysent.c
+++ b/sys/kern/init_sysent.c
@@ -58,6 +58,12 @@
 #define compat13(n, name) .sy_narg = 0, .sy_call = (sy_call_t *)nosys
 #endif
 
+#ifdef COMPAT_FREEBSD14
+#define compat14(n, name) .sy_narg = n, .sy_call = (sy_call_t *)__CONCAT(freebsd14_, name)
+#else
+#define compat14(n, name) .sy_narg = 0, .sy_call = (sy_call_t *)nosys
+#endif
+
 /* The casts are bogus but will do for now. */
 struct sysent sysent[] = {
 	{ .sy_narg = 0, .sy_call = (sy_call_t *)nosys, .sy_auevent = AUE_NULL, .sy_flags = 0, .sy_thrcnt = SY_THR_STATIC },		/* 0 = syscall */
@@ -77,7 +83,7 @@
 	{ compat11(AS(freebsd11_mknod_args),mknod), .sy_auevent = AUE_MKNOD, .sy_flags = 0, .sy_thrcnt = SY_THR_STATIC },	/* 14 = freebsd11 mknod */
 	{ .sy_narg = AS(chmod_args), .sy_call = (sy_call_t *)sys_chmod, .sy_auevent = AUE_CHMOD, .sy_flags = 0, .sy_thrcnt = SY_THR_STATIC },	/* 15 = chmod */
 	{ .sy_narg = AS(chown_args), .sy_call = (sy_call_t *)sys_chown, .sy_auevent = AUE_CHOWN, .sy_flags = 0, .sy_thrcnt = SY_THR_STATIC },	/* 16 = chown */
-	{ .sy_narg = AS(break_args), .sy_call = (sy_call_t *)sys_break, .sy_auevent = AUE_NULL, .sy_flags = SYF_CAPENABLED, .sy_thrcnt = SY_THR_STATIC },	/* 17 = break */
+	{ compat14(AS(freebsd14_break_args),break), .sy_auevent = AUE_NULL, .sy_flags = SYF_CAPENABLED, .sy_thrcnt = SY_THR_STATIC },	/* 17 = freebsd14 break */
 	{ compat4(AS(freebsd4_getfsstat_args),getfsstat), .sy_auevent = AUE_GETFSSTAT, .sy_flags = 0, .sy_thrcnt = SY_THR_STATIC },	/* 18 = freebsd4 getfsstat */
 	{ compat(AS(olseek_args),lseek), .sy_auevent = AUE_LSEEK, .sy_flags = SYF_CAPENABLED, .sy_thrcnt = SY_THR_STATIC },	/* 19 = old lseek */
 	{ .sy_narg = 0, .sy_call = (sy_call_t *)sys_getpid, .sy_auevent = AUE_GETPID, .sy_flags = SYF_CAPENABLED, .sy_thrcnt = SY_THR_STATIC },	/* 20 = getpid */
diff --git a/sys/kern/syscalls.c b/sys/kern/syscalls.c
--- a/sys/kern/syscalls.c
+++ b/sys/kern/syscalls.c
@@ -22,7 +22,7 @@
 	"compat11.mknod",		/* 14 = freebsd11 mknod */
 	"chmod",			/* 15 = chmod */
 	"chown",			/* 16 = chown */
-	"break",			/* 17 = break */
+	"compat14.break",		/* 17 = freebsd14 break */
 	"compat4.getfsstat",		/* 18 = freebsd4 getfsstat */
 	"compat.lseek",		/* 19 = old lseek */
 	"getpid",			/* 20 = getpid */
diff --git a/sys/kern/syscalls.master b/sys/kern/syscalls.master
--- a/sys/kern/syscalls.master
+++ b/sys/kern/syscalls.master
@@ -213,7 +213,7 @@
 		    int gid
 		);
 	}
-17	AUE_NULL	STD|CAPENABLED {
+17	AUE_NULL	COMPAT14|CAPENABLED {
 		void *break(
 		    _In_ char *nsize
 		);
diff --git a/sys/kern/systrace_args.c b/sys/kern/systrace_args.c
--- a/sys/kern/systrace_args.c
+++ b/sys/kern/systrace_args.c
@@ -118,13 +118,6 @@
 		*n_args = 3;
 		break;
 	}
-	/* break */
-	case 17: {
-		struct break_args *p = params;
-		uarg[a++] = (intptr_t)p->nsize; /* char * */
-		*n_args = 1;
-		break;
-	}
 	/* getpid */
 	case 20: {
 		*n_args = 0;
@@ -3619,16 +3612,6 @@
 			break;
 		};
 		break;
-	/* break */
-	case 17:
-		switch (ndx) {
-		case 0:
-			p = "userland char *";
-			break;
-		default:
-			break;
-		};
-		break;
 	/* getpid */
 	case 20:
 		break;
@@ -9287,11 +9270,6 @@
 		if (ndx == 0 || ndx == 1)
 			p = "int";
 		break;
-	/* break */
-	case 17:
-		if (ndx == 0 || ndx == 1)
-			p = "void *";
-		break;
 	/* getpid */
 	case 20:
 	/* mount */
diff --git a/sys/sys/syscall.h b/sys/sys/syscall.h
--- a/sys/sys/syscall.h
+++ b/sys/sys/syscall.h
@@ -21,7 +21,7 @@
 #define	SYS_freebsd11_mknod	14
 #define	SYS_chmod	15
 #define	SYS_chown	16
-#define	SYS_break	17
+#define	SYS_freebsd14_break	17
 				/* 18 is freebsd4 getfsstat */
 				/* 19 is old lseek */
 #define	SYS_getpid	20
diff --git a/sys/sys/syscall.mk b/sys/sys/syscall.mk
--- a/sys/sys/syscall.mk
+++ b/sys/sys/syscall.mk
@@ -16,7 +16,7 @@
 	freebsd11_mknod.o \
 	chmod.o \
 	chown.o \
-	break.o \
+	freebsd14_break.o \
 	getpid.o \
 	mount.o \
 	unmount.o \
diff --git a/sys/sys/sysproto.h b/sys/sys/sysproto.h
--- a/sys/sys/sysproto.h
+++ b/sys/sys/sysproto.h
@@ -85,9 +85,6 @@
 	char uid_l_[PADL_(int)]; int uid; char uid_r_[PADR_(int)];
 	char gid_l_[PADL_(int)]; int gid; char gid_r_[PADR_(int)];
 };
-struct break_args {
-	char nsize_l_[PADL_(char *)]; char * nsize; char nsize_r_[PADR_(char *)];
-};
 struct getpid_args {
 	syscallarg_t dummy;
 };
@@ -1883,7 +1880,6 @@
 int	sys_fchdir(struct thread *, struct fchdir_args *);
 int	sys_chmod(struct thread *, struct chmod_args *);
 int	sys_chown(struct thread *, struct chown_args *);
-int	sys_break(struct thread *, struct break_args *);
 int	sys_getpid(struct thread *, struct getpid_args *);
 int	sys_mount(struct thread *, struct mount_args *);
 int	sys_unmount(struct thread *, struct unmount_args *);
@@ -2762,6 +2758,10 @@
 
 #ifdef COMPAT_FREEBSD14
 
+struct freebsd14_break_args {
+	char nsize_l_[PADL_(char *)]; char * nsize; char nsize_r_[PADR_(char *)];
+};
+int	freebsd14_break(struct thread *, struct freebsd14_break_args *);
 
 #endif /* COMPAT_FREEBSD14 */
 
@@ -2780,7 +2780,7 @@
 #define	SYS_AUE_freebsd11_mknod	AUE_MKNOD
 #define	SYS_AUE_chmod	AUE_CHMOD
 #define	SYS_AUE_chown	AUE_CHOWN
-#define	SYS_AUE_break	AUE_NULL
+#define	SYS_AUE_freebsd14_break	AUE_NULL
 #define	SYS_AUE_freebsd4_getfsstat	AUE_GETFSSTAT
 #define	SYS_AUE_olseek	AUE_LSEEK
 #define	SYS_AUE_getpid	AUE_GETPID
diff --git a/sys/vm/vm_unix.c b/sys/vm/vm_unix.c
--- a/sys/vm/vm_unix.c
+++ b/sys/vm/vm_unix.c
@@ -59,13 +59,14 @@
 #include <vm/pmap.h>
 #include <vm/vm_map.h>
 
+#ifdef COMPAT_FREEBSD14
 #ifndef _SYS_SYSPROTO_H_
-struct break_args {
+struct freebsd14_break_args {
 	char *nsize;
 };
 #endif
 int
-sys_break(struct thread *td, struct break_args *uap)
+freebsd14_break(struct thread *td, struct freebsd14_break_args *uap)
 {
 #if !defined(__aarch64__) && !defined(__riscv)
 	uintptr_t addr;
@@ -80,6 +81,7 @@
 	return (ENOSYS);
 #endif /* defined(__aarch64__) || defined(__riscv) */
 }
+#endif
 
 int
 kern_break(struct thread *td, uintptr_t *addr)