diff --git a/include/openbsc/debug.h b/include/openbsc/debug.h
index 6fea587..55a06d1 100644
--- a/include/openbsc/debug.h
+++ b/include/openbsc/debug.h
@@ -9,6 +9,7 @@
 #define DRR		0x0008
 #define DRSL		0x0010
 #define DNM		0x0020
+#define DSMS		0x0100
 #define DMI		0x1000
 #define DMIB		0x2000
 
diff --git a/include/openbsc/gsm_04_08.h b/include/openbsc/gsm_04_08.h
index 389daf5..f10d821 100644
--- a/include/openbsc/gsm_04_08.h
+++ b/include/openbsc/gsm_04_08.h
@@ -69,12 +69,19 @@
 	u_int8_t data[0];
 } __attribute__ ((packed));
 
-/* Section 10.2 */
+/* Section 10.2 + GSM 04.07 12.2.3.1.1 */
+#define GSM48_PDISC_GROUP_CC	0x00
+#define GSM48_PDISC_BCAST_CC	0x01
+#define GSM48_PDISC_PDSS1	0x02
 #define GSM48_PDISC_CC		0x03
+#define GSM48_PDISC_PDSS2	0x04
 #define GSM48_PDISC_MM		0x05
 #define GSM48_PDISC_RR		0x06
 #define GSM48_PDISC_MM_GPRS	0x08
-#define GSM48_PDISC_SM		0x0a
+#define GSM48_PDISC_SMS		0x09
+#define GSM48_PDISC_SM_GPRS	0x0a
+#define GSM48_PDISC_NC_SS	0x0b
+#define GSM48_PDISC_LOC		0x0c
 
 /* Section 10.4 */
 #define GSM48_MT_RR_INIT_REQ		0x3c