diff --git a/include/osmocom/gsm/gsup.h b/include/osmocom/gsm/gsup.h
index 285bc0c..56d7a30 100644
--- a/include/osmocom/gsm/gsup.h
+++ b/include/osmocom/gsm/gsup.h
@@ -107,6 +107,7 @@
 
 	OSMO_GSUP_IMEI_IE			= 0x50,
 	OSMO_GSUP_IMEI_RESULT_IE		= 0x51,
+	OSMO_GSUP_NUM_VECTORS_REQ_IE		= 0x52,
 
 	/* Inter-MSC handover related */
 	OSMO_GSUP_SOURCE_NAME_IE		= 0x60,