diff --git a/include/sys/uio.h b/include/sys/uio.h
index 624ff4225492437a83b60a58231228374937cbae..60c5c2fed90c3b7d4250c47ecdb6427c00eaa2d7 100644
--- a/include/sys/uio.h
+++ b/include/sys/uio.h
@@ -11,6 +11,10 @@ extern "C" {
 #define __NEED_ssize_t
 #define __NEED_struct_iovec
 
+#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
+#define __NEED_off_t
+#endif
+
 #ifdef _GNU_SOURCE
 #define __NEED_pid_t
 #endif
@@ -20,6 +24,11 @@ extern "C" {
 ssize_t readv (int, const struct iovec *, int);
 ssize_t writev (int, const struct iovec *, int);
 
+#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
+ssize_t preadv (int, const struct iovec *, int, off_t);
+ssize_t pwritev (int, const struct iovec *, int, off_t);
+#endif
+
 #ifdef _GNU_SOURCE
 ssize_t process_vm_writev(pid_t, const struct iovec *, unsigned long, const struct iovec *, unsigned long, unsigned long);
 ssize_t process_vm_readv(pid_t, const struct iovec *, unsigned long, const struct iovec *, unsigned long, unsigned long);
diff --git a/src/unistd/preadv.c b/src/unistd/preadv.c
new file mode 100644
index 0000000000000000000000000000000000000000..371e46f8fc62806722d4ee64706058f71d67b1d5
--- /dev/null
+++ b/src/unistd/preadv.c
@@ -0,0 +1,13 @@
+#define _GNU_SOURCE
+#include <sys/uio.h>
+#include <unistd.h>
+#include "syscall.h"
+#include "libc.h"
+
+ssize_t preadv(int fd, const struct iovec *iov, int count, off_t ofs)
+{
+	return syscall_cp(SYS_preadv, fd, iov, count,
+		(long)(ofs), (long)(ofs>>32));
+}
+
+LFS64(preadv);
diff --git a/src/unistd/pwritev.c b/src/unistd/pwritev.c
new file mode 100644
index 0000000000000000000000000000000000000000..1df268d5a76f2b65c1a0fa4f136770665326375b
--- /dev/null
+++ b/src/unistd/pwritev.c
@@ -0,0 +1,13 @@
+#define _GNU_SOURCE
+#include <sys/uio.h>
+#include <unistd.h>
+#include "syscall.h"
+#include "libc.h"
+
+ssize_t pwritev(int fd, const struct iovec *iov, int count, off_t ofs)
+{
+	return syscall_cp(SYS_pwritev, fd, iov, count,
+		(long)(ofs), (long)(ofs>>32));
+}
+
+LFS64(pwritev);