diff --git a/openair2/COMMON/platform_constants.h b/openair2/COMMON/platform_constants.h
index d409650528..f053fe7f1e 100644
--- a/openair2/COMMON/platform_constants.h
+++ b/openair2/COMMON/platform_constants.h
@@ -102,6 +102,9 @@
 #define NB_RB_MAX      (LTE_maxDRB + 3) /* was 11, now 14, maxDRB comes from asn1_constants.h, + 3 because of 3 SRB, one invisible id 0, then id 1 and 2 */
 #define NR_NB_RB_MAX   (NR_maxDRB + 3)
 
+#define NGAP_MAX_PDU_SESSION (256)  /* As defined in TS 38.413 9.2.1.1 Range Bound for PDU Sessions. */
+#define NGAP_MAX_DRBS_PER_UE (32)   /* As defined in TS 38.413 9.2.1.1 - maxnoofDRBs */
+
 #define NB_RB_MBMS_MAX (LTE_maxSessionPerPMCH*LTE_maxServiceCount)
 
 #define NB_RAB_MAX     LTE_maxDRB       /* was 8, now 11 */