diff --git a/headers/posix/sys/un.h b/headers/posix/sys/un.h
new file mode 100644
index 0000000000..e85af6bbf5
--- /dev/null
+++ b/headers/posix/sys/un.h
@@ -0,0 +1,18 @@
+/*
+ * Copyright 2006, Haiku Inc. All Rights Reserved.
+ * Distributed under the terms of the MIT License.
+ */
+#ifndef _SYS_UN_H
+#define _SYS_UN_H
+
+
+#include <sys/socket.h>
+
+
+struct sockaddr_un {
+	uint8_t		sun_len;	
+	uint8_t		sun_family;
+	uint8_t		sun_path[128];
+};
+
+#endif	/* _SYS_UN_H */