diff --git a/include/net/ax25.h b/include/net/ax25.h
index 2250a18..d052b22 100644
--- a/include/net/ax25.h
+++ b/include/net/ax25.h
@@ -110,8 +110,15 @@
 enum {
 	AX25_PROTO_STD_SIMPLEX,
 	AX25_PROTO_STD_DUPLEX,
+#ifdef CONFIG_AX25_DAMA_SLAVE
 	AX25_PROTO_DAMA_SLAVE,
-	AX25_PROTO_DAMA_MASTER
+#ifdef CONFIG_AX25_DAMA_MASTER
+	AX25_PROTO_DAMA_MASTER,
+#define AX25_PROTO_MAX AX25_PROTO_DAMA_MASTER
+#endif
+#endif
+	__AX25_PROTO_MAX,
+	AX25_PROTO_MAX = __AX25_PROTO_MAX -1
 };
 
 enum {
diff --git a/net/ax25/sysctl_net_ax25.c b/net/ax25/sysctl_net_ax25.c
index f67711f..894a225 100644
--- a/net/ax25/sysctl_net_ax25.c
+++ b/net/ax25/sysctl_net_ax25.c
@@ -24,7 +24,7 @@
 static int min_idle[1],  		max_idle[] = {65535 * HZ};
 static int min_n2[] = {1},		max_n2[] = {31};
 static int min_paclen[] = {1},		max_paclen[] = {512};
-static int min_proto[1],		max_proto[] = {3};
+static int min_proto[1],		max_proto[] = { AX25_PROTO_MAX };
 static int min_ds_timeout[1],   	max_ds_timeout[] = {65535 * HZ};
 
 static struct ctl_table_header *ax25_table_header;