diff --git a/basis/unix/ffi/ffi.factor b/basis/unix/ffi/ffi.factor
index 52b8e80234..7c0080f6e8 100644
--- a/basis/unix/ffi/ffi.factor
+++ b/basis/unix/ffi/ffi.factor
@@ -44,6 +44,10 @@ CONSTANT: AI_V4MAPPED       0x0008
 CONSTANT: AI_ALL            0x0010
 CONSTANT: AI_ADDRCONFIG     0x0020
 
+CONSTANT: SHUT_RD     0
+CONSTANT: SHUT_WR     1
+CONSTANT: SHUT_RDWR   2
+
 LIBRARY: libc
 
 STRUCT: group