diff --git a/src/runtime/defs_linux_386.go b/src/runtime/defs_linux_386.go
index 7cf57c84523..44d2fd1d483 100644
--- a/src/runtime/defs_linux_386.go
+++ b/src/runtime/defs_linux_386.go
@@ -90,6 +90,10 @@ const (
 	_EPOLL_CTL_ADD = 0x1
 	_EPOLL_CTL_DEL = 0x2
 	_EPOLL_CTL_MOD = 0x3
+
+	_AF_UNIX    = 0x1
+	_F_SETFL    = 0x4
+	_SOCK_DGRAM = 0x2
 )
 
 type fpreg struct {
@@ -218,3 +222,8 @@ type epollevent struct {
 	events uint32
 	data   [8]byte // to match amd64
 }
+
+type sockaddr_un struct {
+	family uint16
+	path   [108]byte
+}