diff --git a/lib/std/c.zig b/lib/std/c.zig
index 1e86bfbd8c..6b389c23ef 100644
--- a/lib/std/c.zig
+++ b/lib/std/c.zig
@@ -108,7 +108,6 @@ pub extern "c" fn fork() c_int;
 pub extern "c" fn access(path: [*:0]const u8, mode: c_uint) c_int;
 pub extern "c" fn faccessat(dirfd: fd_t, path: [*:0]const u8, mode: c_uint, flags: c_uint) c_int;
 pub extern "c" fn pipe(fds: *[2]fd_t) c_int;
-pub extern "c" fn pipe2(fds: *[2]fd_t, flags: u32) c_int;
 pub extern "c" fn mkdir(path: [*:0]const u8, mode: c_uint) c_int;
 pub extern "c" fn mkdirat(dirfd: fd_t, path: [*:0]const u8, mode: u32) c_int;
 pub extern "c" fn symlink(existing: [*:0]const u8, new: [*:0]const u8) c_int;
diff --git a/lib/std/c/dragonfly.zig b/lib/std/c/dragonfly.zig
index b57aa3c795..4e6650094b 100644
--- a/lib/std/c/dragonfly.zig
+++ b/lib/std/c/dragonfly.zig
@@ -13,6 +13,7 @@ pub fn _errno() *c_int {
 pub extern "c" fn getdents(fd: c_int, buf_ptr: [*]u8, nbytes: usize) usize;
 pub extern "c" fn sigaltstack(ss: ?*stack_t, old_ss: ?*stack_t) c_int;
 pub extern "c" fn getrandom(buf_ptr: [*]u8, buf_len: usize, flags: c_uint) isize;
+pub extern "c" fn pipe2(fds: *[2]fd_t, flags: u32) c_int;
 
 pub const dl_iterate_phdr_callback = fn (info: *dl_phdr_info, size: usize, data: ?*c_void) callconv(.C) c_int;
 pub extern "c" fn dl_iterate_phdr(callback: dl_iterate_phdr_callback, data: ?*c_void) c_int;
diff --git a/lib/std/c/freebsd.zig b/lib/std/c/freebsd.zig
index a6c84c66fa..795b36dc68 100644
--- a/lib/std/c/freebsd.zig
+++ b/lib/std/c/freebsd.zig
@@ -14,6 +14,7 @@ pub extern "c" fn sigaltstack(ss: ?*stack_t, old_ss: ?*stack_t) c_int;
 pub extern "c" fn getrandom(buf_ptr: [*]u8, buf_len: usize, flags: c_uint) isize;
 
 pub extern "c" fn pthread_getthreadid_np() c_int;
+pub extern "c" fn pipe2(fds: *[2]fd_t, flags: u32) c_int;
 
 pub extern "c" fn posix_memalign(memptr: *?*c_void, alignment: usize, size: usize) c_int;
 pub extern "c" fn malloc_usable_size(?*const c_void) usize;
diff --git a/lib/std/c/linux.zig b/lib/std/c/linux.zig
index fbfabdd568..d2018f6f79 100644
--- a/lib/std/c/linux.zig
+++ b/lib/std/c/linux.zig
@@ -86,6 +86,7 @@ pub extern "c" fn dl_iterate_phdr(callback: dl_iterate_phdr_callback, data: ?*c_
 pub extern "c" fn sigaltstack(ss: ?*stack_t, old_ss: ?*stack_t) c_int;
 
 pub extern "c" fn memfd_create(name: [*:0]const u8, flags: c_uint) c_int;
+pub extern "c" fn pipe2(fds: *[2]fd_t, flags: u32) c_int;
 
 pub extern "c" fn fallocate(fd: fd_t, mode: c_int, offset: off_t, len: off_t) c_int;
 
diff --git a/lib/std/c/netbsd.zig b/lib/std/c/netbsd.zig
index 46a38706f4..7169095197 100644
--- a/lib/std/c/netbsd.zig
+++ b/lib/std/c/netbsd.zig
@@ -16,6 +16,7 @@ pub extern "c" fn dl_iterate_phdr(callback: dl_iterate_phdr_callback, data: ?*c_
 
 pub extern "c" fn _lwp_self() lwpid_t;
 
+pub extern "c" fn pipe2(fds: *[2]fd_t, flags: u32) c_int;
 pub extern "c" fn arc4random_buf(buf: [*]u8, len: usize) void;
 pub extern "c" fn __fstat50(fd: fd_t, buf: *Stat) c_int;
 pub extern "c" fn __stat50(path: [*:0]const u8, buf: *Stat) c_int;
diff --git a/lib/std/c/openbsd.zig b/lib/std/c/openbsd.zig
index 99debf57e7..cac3df867d 100644
--- a/lib/std/c/openbsd.zig
+++ b/lib/std/c/openbsd.zig
@@ -17,6 +17,7 @@ pub extern "c" fn dl_iterate_phdr(callback: dl_iterate_phdr_callback, data: ?*c_
 pub extern "c" fn arc4random_buf(buf: [*]u8, len: usize) void;
 
 pub extern "c" fn getthrid() pid_t;
+pub extern "c" fn pipe2(fds: *[2]fd_t, flags: u32) c_int;
 
 pub extern "c" fn getdents(fd: c_int, buf_ptr: [*]u8, nbytes: usize) usize;
 pub extern "c" fn sigaltstack(ss: ?*stack_t, old_ss: ?*stack_t) c_int;