diff --git a/include/osmocore/protocol/gsm_04_08.h b/include/osmocore/protocol/gsm_04_08.h
index 801b9b5..47b98b2 100644
--- a/include/osmocore/protocol/gsm_04_08.h
+++ b/include/osmocore/protocol/gsm_04_08.h
@@ -685,6 +685,7 @@
 /* Chapter 5.1.2.2 */
 #define	GSM_CSTATE_NULL			0
 #define	GSM_CSTATE_INITIATED		1
+#define	GSM_CSTATE_MM_CONNECTION_PEND	2 /* see 10.5.4.6 */
 #define	GSM_CSTATE_MO_CALL_PROC		3
 #define	GSM_CSTATE_CALL_DELIVERED	4
 #define	GSM_CSTATE_CALL_PRESENT		6
diff --git a/src/gsm48.c b/src/gsm48.c
index d024109..e0cba15 100644
--- a/src/gsm48.c
+++ b/src/gsm48.c
@@ -97,10 +97,10 @@
 };
 
 /* FIXME: convert to value_string */
-static const char *cc_state_names[32] = {
+static const char *cc_state_names[33] = {
 	"NULL",
 	"INITIATED",
-	"illegal state 2",
+	"MM_CONNECTION_PEND",
 	"MO_CALL_PROC",
 	"CALL_DELIVERED",
 	"illegal state 5",