diff --git a/src/unix/bsd/apple/mod.rs b/src/unix/bsd/apple/mod.rs
index 24ad12be..904bfe00 100644
--- a/src/unix/bsd/apple/mod.rs
+++ b/src/unix/bsd/apple/mod.rs
@@ -2823,6 +2823,9 @@ pub const P_ALL: idtype_t = 0;
 pub const P_PID: idtype_t = 1;
 pub const P_PGID: idtype_t = 2;
 
+pub const UTIME_OMIT: c_long = -2;
+pub const UTIME_NOW: c_long = -1;
+
 pub const XATTR_NOFOLLOW: ::c_int = 0x0001;
 pub const XATTR_CREATE: ::c_int = 0x0002;
 pub const XATTR_REPLACE: ::c_int = 0x0004;
diff --git a/src/unix/bsd/freebsdlike/freebsd/mod.rs b/src/unix/bsd/freebsdlike/freebsd/mod.rs
index fea680d2..62d41640 100644
--- a/src/unix/bsd/freebsdlike/freebsd/mod.rs
+++ b/src/unix/bsd/freebsdlike/freebsd/mod.rs
@@ -1041,6 +1041,9 @@ pub const P_PID: idtype_t = 0;
 pub const P_PGID: idtype_t = 2;
 pub const P_ALL: idtype_t = 7;
 
+pub const UTIME_OMIT: c_long = -2;
+pub const UTIME_NOW: c_long = -1;
+
 pub const B460800: ::speed_t = 460800;
 pub const B921600: ::speed_t = 921600;
 
diff --git a/src/unix/bsd/netbsdlike/netbsd/mod.rs b/src/unix/bsd/netbsdlike/netbsd/mod.rs
index 893b1575..c4e03ade 100644
--- a/src/unix/bsd/netbsdlike/netbsd/mod.rs
+++ b/src/unix/bsd/netbsdlike/netbsd/mod.rs
@@ -1357,6 +1357,9 @@ pub const P_ALL: idtype_t = 0;
 pub const P_PID: idtype_t = 1;
 pub const P_PGID: idtype_t = 4;
 
+pub const UTIME_OMIT: c_long = 1073741822;
+pub const UTIME_NOW: c_long = 1073741823;
+
 pub const B460800: ::speed_t = 460800;
 pub const B921600: ::speed_t = 921600;
 
diff --git a/src/unix/haiku/mod.rs b/src/unix/haiku/mod.rs
index c8cf8ad2..fe1929f9 100644
--- a/src/unix/haiku/mod.rs
+++ b/src/unix/haiku/mod.rs
@@ -1039,6 +1039,9 @@ pub const P_ALL: idtype_t = 0;
 pub const P_PID: idtype_t = 1;
 pub const P_PGID: idtype_t = 2;
 
+pub const UTIME_OMIT: c_long = 1000000001;
+pub const UTIME_NOW: c_long = 1000000000;
+
 pub const VINTR: usize = 0;
 pub const VQUIT: usize = 1;
 pub const VERASE: usize = 2;
diff --git a/src/unix/solarish/mod.rs b/src/unix/solarish/mod.rs
index 78956146..f8a64547 100644
--- a/src/unix/solarish/mod.rs
+++ b/src/unix/solarish/mod.rs
@@ -965,6 +965,9 @@ pub const P_CTID: idtype_t = 13;
 pub const P_CPUID: idtype_t = 14;
 pub const P_PSETID: idtype_t = 15;
 
+pub const UTIME_OMIT: c_long = -2;
+pub const UTIME_NOW: c_long = -1;
+
 pub const PROT_NONE: ::c_int = 0;
 pub const PROT_READ: ::c_int = 1;
 pub const PROT_WRITE: ::c_int = 2;
diff --git a/src/wasi.rs b/src/wasi.rs
index e1ffeded..551f8b96 100644
--- a/src/wasi.rs
+++ b/src/wasi.rs
@@ -334,6 +334,9 @@ pub const AT_EACCESS: c_int = 0x0;
 pub const AT_SYMLINK_NOFOLLOW: c_int = 0x1;
 pub const AT_SYMLINK_FOLLOW: c_int = 0x2;
 pub const AT_REMOVEDIR: c_int = 0x4;
+pub const UTIME_OMIT: c_long = 1073741822;
+pub const UTIME_NOW: c_long = 1073741823;
+
 
 pub const E2BIG: c_int = __WASI_E2BIG as c_int;
 pub const EACCES: c_int = __WASI_EACCES as c_int;