diff --git a/src/unix/notbsd/linux/mod.rs b/src/unix/notbsd/linux/mod.rs
index daf5641..46ed807 100644
--- a/src/unix/notbsd/linux/mod.rs
+++ b/src/unix/notbsd/linux/mod.rs
@@ -248,6 +248,8 @@
 pub const ABMON_11: ::nl_item = 0x20018;
 pub const ABMON_12: ::nl_item = 0x20019;
 
+pub const CLONE_NEWCGROUP: ::c_int = 0x02000000;
+
 pub const MON_1: ::nl_item = 0x2001A;
 pub const MON_2: ::nl_item = 0x2001B;
 pub const MON_3: ::nl_item = 0x2001C;