diff --git a/usr/include/unistd.h b/usr/include/unistd.h
index 3244e21..3af4c8f 100644
--- a/usr/include/unistd.h
+++ b/usr/include/unistd.h
@@ -71,6 +71,7 @@
 __extern int mkdirat(int, const char *, const char *, mode_t);
 __extern int rmdir(const char *);
 __extern int pipe(int *);
+__extern int pipe2(int *, int);
 __extern int chroot(const char *);
 __extern int symlink(const char *, const char *);
 __extern int symlinkat(int, const char *, const char *);
diff --git a/usr/klibc/SYSCALLS.def b/usr/klibc/SYSCALLS.def
index 5fd2753..d935a92 100644
--- a/usr/klibc/SYSCALLS.def
+++ b/usr/klibc/SYSCALLS.def
@@ -124,6 +124,7 @@
 <?> int mkdirat(int, const char *, const char *, mode_t);
 int rmdir(const char *);
 <!alpha,ia64,mips,mips64,sh,sparc,sparc64> int pipe(int *);
+int pipe2(int *, int);
 mode_t umask(mode_t);
 int chroot(const char *);
 int symlink(const char *, const char *);