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-rw-r--r--include/osmocom/gsm/protocol/gsm_23_003.h1
1 files changed, 1 insertions, 0 deletions
diff --git a/include/osmocom/gsm/protocol/gsm_23_003.h b/include/osmocom/gsm/protocol/gsm_23_003.h
index 3e5c3e57..15656f8a 100644
--- a/include/osmocom/gsm/protocol/gsm_23_003.h
+++ b/include/osmocom/gsm/protocol/gsm_23_003.h
@@ -10,6 +10,7 @@
#define OSMO_IMSI_BUF_SIZE (GSM23003_IMSI_MAX_DIGITS+2)
/* Chapter 2.4 */
#define GSM23003_TMSI_NUM_BYTES 4
+#define GSM23003_TMSI_SGSN_MASK 0xC0000000UL
/* Chapter 2.5 */
#define GSM23003_LMSI_NUM_BYTES 4
/* Chapter 2.6 */