--- zzzz-none-000/linux-2.6.13.1/include/linux/isdn/capilli.h	2005-09-10 02:42:58.000000000 +0000
+++ ohio-7170-487/linux-2.6.13.1/include/linux/isdn/capilli.h	2006-01-16 15:06:26.000000000 +0000
@@ -17,6 +17,14 @@
 #include <linux/capi.h>
 #include <linux/kernelcapi.h>
 
+#ifndef LINUX_VERSION_CODE
+# include <linux/version.h>
+#endif
+
+#if LINUX_VERSION_CODE < KERNEL_VERSION(2, 6, 0)
+#error "capilli.h aus linux-dir nur fuer kernel >= 2.6 einsetzen!"
+#endif
+
 typedef struct capiloaddatapart {
 	int user;		/* data in userspace ? */
 	int len;