diff --git a/src/unix/bsd/freebsdlike/dragonfly/mod.rs b/src/unix/bsd/freebsdlike/dragonfly/mod.rs
index 642dd1fc0cbd5..179cd913b3862 100644
--- a/src/unix/bsd/freebsdlike/dragonfly/mod.rs
+++ b/src/unix/bsd/freebsdlike/dragonfly/mod.rs
@@ -293,6 +293,8 @@ pub const NOTE_TRACK: ::uint32_t = 0x00000001;
 pub const NOTE_TRACKERR: ::uint32_t = 0x00000002;
 pub const NOTE_CHILD: ::uint32_t = 0x00000004;
 
+pub const MSG_NOSIGNAL: ::uint32_t = 0x400;
+
 extern {
     pub fn mprotect(addr: *mut ::c_void, len: ::size_t, prot: ::c_int)
                     -> ::c_int;
diff --git a/src/unix/bsd/freebsdlike/freebsd/mod.rs b/src/unix/bsd/freebsdlike/freebsd/mod.rs
index 31188ac92bf85..a89440ebdebac 100644
--- a/src/unix/bsd/freebsdlike/freebsd/mod.rs
+++ b/src/unix/bsd/freebsdlike/freebsd/mod.rs
@@ -272,6 +272,8 @@ pub const CTL_P1003_1B_SIGQUEUE_MAX: ::c_int = 24;
 pub const CTL_P1003_1B_TIMER_MAX: ::c_int = 25;
 pub const CTL_P1003_1B_MAXID: ::c_int = 26;
 
+pub const MSG_NOSIGNAL: ::c_int = 0x20000;
+
 extern {
     pub fn __error() -> *mut ::c_int;
 
diff --git a/src/unix/bsd/netbsdlike/mod.rs b/src/unix/bsd/netbsdlike/mod.rs
index a5ecfb1b79594..6604ec03b2cb2 100644
--- a/src/unix/bsd/netbsdlike/mod.rs
+++ b/src/unix/bsd/netbsdlike/mod.rs
@@ -392,6 +392,8 @@ pub const SO_RCVLOWAT: ::c_int = 0x1004;
 pub const SO_ERROR: ::c_int = 0x1007;
 pub const SO_TYPE: ::c_int = 0x1008;
 
+pub const MSG_NOSIGNAL: ::c_int = 0x400;
+
 pub const IFF_LOOPBACK: ::c_int = 0x8;
 
 pub const SHUT_RD: ::c_int = 0;
diff --git a/src/unix/haiku/mod.rs b/src/unix/haiku/mod.rs
index 21bb1d398349d..320cb767d257e 100644
--- a/src/unix/haiku/mod.rs
+++ b/src/unix/haiku/mod.rs
@@ -548,6 +548,8 @@ pub const IPV6_V6ONLY: ::c_int = 30;
 
 pub const SO_DEBUG: ::c_int = 0x00000004;
 
+pub const MSG_NOSIGNAL: ::c_int = 0x0800;
+
 pub const SHUT_RD: ::c_int = 0;
 pub const SHUT_WR: ::c_int = 1;
 pub const SHUT_RDWR: ::c_int = 2;