diff --git a/src/unix/bsd/mod.rs b/src/unix/bsd/mod.rs
index dd4508ac..b0788124 100644
--- a/src/unix/bsd/mod.rs
+++ b/src/unix/bsd/mod.rs
@@ -190,6 +190,8 @@ pub const IPV6_MULTICAST_HOPS: ::c_int = 10;
 pub const IPV6_MULTICAST_LOOP: ::c_int = 11;
 pub const IPV6_V6ONLY: ::c_int = 27;
 
+pub const IPTOS_ECN_NOTECT: u8 = 0x00;
+
 pub const ST_RDONLY: ::c_ulong = 1;
 
 pub const SCM_RIGHTS: ::c_int = 0x01;
diff --git a/src/unix/mod.rs b/src/unix/mod.rs
index 5a293d53..2e3d7a48 100644
--- a/src/unix/mod.rs
+++ b/src/unix/mod.rs
@@ -297,7 +297,6 @@ pub const IPPROTO_IP: ::c_int = 0;
 pub const IPPROTO_IPV6: ::c_int = 41;
 
 pub const IPTOS_ECN_MASK: u8 = 0x03;
-pub const IPTOS_ECN_NOT_ECT: u8 = 0x00;
 pub const IPTOS_ECN_ECT1: u8 = 0x01;
 pub const IPTOS_ECN_ECT0: u8 = 0x02;
 pub const IPTOS_ECN_CE: u8 = 0x03;
diff --git a/src/unix/notbsd/android/mod.rs b/src/unix/notbsd/android/mod.rs
index 31e0c44d..972281c8 100644
--- a/src/unix/notbsd/android/mod.rs
+++ b/src/unix/notbsd/android/mod.rs
@@ -666,6 +666,8 @@ pub const SO_RXQ_OVFL: ::c_int = 40;
 pub const SO_PEEK_OFF: ::c_int = 42;
 pub const SO_BUSY_POLL: ::c_int = 46;
 
+pub const IPTOS_ECN_NOTECT: u8 = 0x00;
+
 pub const O_ACCMODE: ::c_int = 3;
 pub const O_APPEND: ::c_int = 1024;
 pub const O_CREAT: ::c_int = 64;
diff --git a/src/unix/notbsd/linux/mod.rs b/src/unix/notbsd/linux/mod.rs
index b8da914a..8669a06c 100644
--- a/src/unix/notbsd/linux/mod.rs
+++ b/src/unix/notbsd/linux/mod.rs
@@ -1612,6 +1612,8 @@ pub const SIOCSIFMAP: ::c_ulong = 0x00008971;
 pub const IPTOS_TOS_MASK: u8 = 0x1E;
 pub const IPTOS_PREC_MASK: u8 = 0xE0;
 
+pub const IPTOS_ECN_NOT_ECT: u8 = 0x00;
+
 pub const RTF_UP: ::c_ushort = 0x0001;
 pub const RTF_GATEWAY: ::c_ushort = 0x0002;