Index: standalone/include/linux/mISDNif_s.h
===================================================================
--- standalone.orig/include/linux/mISDNif_s.h
+++ standalone/include/linux/mISDNif_s.h
@@ -278,6 +278,12 @@ struct mISDNhead {
 #define MISDN_MAX_CHANNEL	127
 #define MISDN_CHMAP_SIZE	((MISDN_MAX_CHANNEL + 1) >> 3)
 
+/* socket */
+#ifndef	AF_ISDN
+#define AF_ISDN		27
+#define PF_ISDN		AF_ISDN
+#endif
+
 #define SOL_MISDN	0
 
 struct sockaddr_mISDN {
