diff --git a/openair2/GNB_APP/gnb_config.c b/openair2/GNB_APP/gnb_config.c
index 51913209c9..4b7dccab3f 100644
--- a/openair2/GNB_APP/gnb_config.c
+++ b/openair2/GNB_APP/gnb_config.c
@@ -288,7 +288,7 @@ void fill_scc_sim(NR_ServingCellConfigCommon_t *scc, uint64_t *ssb_bitmap, int N
   rach_ConfigCommon->choice.setup->prach_RootSequenceIndex.present = NR_RACH_ConfigCommon__prach_RootSequenceIndex_PR_l139;
   rach_ConfigCommon->choice.setup->prach_RootSequenceIndex.choice.l139 = 0;
   rach_ConfigCommon->choice.setup->restrictedSetConfig = NR_RACH_ConfigCommon__restrictedSetConfig_unrestrictedSet;
-  *rach_ConfigCommon->choice.setup->msg1_SubcarrierSpacing = -1;
+  *rach_ConfigCommon->choice.setup->msg1_SubcarrierSpacing = mu_ul;
   struct NR_SetupRelease_PUSCH_ConfigCommon *pusch_ConfigCommon = initialUplinkBWP->pusch_ConfigCommon;
 
   asn1cSeqAdd(&pusch_ConfigCommon->choice.setup->pusch_TimeDomainAllocationList->list, add_PUSCH_TimeDomainResourceAllocation(55));