diff --git a/src/include/gpxe/socket.h b/src/include/gpxe/socket.h
new file mode 100644
index 00000000..a89b3aff
--- /dev/null
+++ b/src/include/gpxe/socket.h
@@ -0,0 +1,31 @@
+#ifndef _GPXE_SOCKET_H
+#define _GPXE_SOCKET_H
+
+/** @file
+ *
+ * Socket addresses
+ *
+ */
+
+/* Network address family numbers */
+#define AF_INET		1
+#define AF_INET6	2
+
+/** A socket address family */
+typedef uint16_t sa_family_t;
+
+/**
+ * Generalized socket address structure
+ *
+ * This contains the fields common to socket addresses for all address
+ * families.
+ */
+struct sockaddr {
+	/** Socket address family
+	 *
+	 * This is an AF_XXX constant.
+	 */
+        sa_family_t sa_family;
+};
+
+#endif /* _GPXE_SOCKET_H */