diff --git a/targets/PROJECTS/GENERIC-NR-5GC/CONF/gnb.sa.band41.fr1.106PRB.usrpb210.conf b/targets/PROJECTS/GENERIC-NR-5GC/CONF/gnb.sa.band41.fr1.106PRB.usrpb210.conf
index dd18cf624e..0bd9861ad9 100644
--- a/targets/PROJECTS/GENERIC-NR-5GC/CONF/gnb.sa.band41.fr1.106PRB.usrpb210.conf
+++ b/targets/PROJECTS/GENERIC-NR-5GC/CONF/gnb.sa.band41.fr1.106PRB.usrpb210.conf
@@ -104,7 +104,7 @@ gNBs =
 #prach_msg1_FDM
 #0 = one, 1=two, 2=four, 3=eight
           prach_msg1_FDM                                            = 0;
-          prach_msg1_FrequencyStart                                 = 0;
+          prach_msg1_FrequencyStart                                 = 27;
           zeroCorrelationZoneConfig                                 = 13;
           preambleReceivedTargetPower                               = -96;
 #preamblTransMax (0...10) = (3,4,5,6,7,8,10,20,50,100,200)
diff --git a/targets/PROJECTS/GENERIC-NR-5GC/CONF/gnb.sa.band78.fr1.106PRB.usrpb210.conf b/targets/PROJECTS/GENERIC-NR-5GC/CONF/gnb.sa.band78.fr1.106PRB.usrpb210.conf
index 001e5b917a..9a666d4c6b 100644
--- a/targets/PROJECTS/GENERIC-NR-5GC/CONF/gnb.sa.band78.fr1.106PRB.usrpb210.conf
+++ b/targets/PROJECTS/GENERIC-NR-5GC/CONF/gnb.sa.band78.fr1.106PRB.usrpb210.conf
@@ -104,7 +104,7 @@ gNBs =
 #prach_msg1_FDM
 #0 = one, 1=two, 2=four, 3=eight
           prach_msg1_FDM                                            = 0;
-          prach_msg1_FrequencyStart                                 = 0;
+          prach_msg1_FrequencyStart                                 = 27;
           zeroCorrelationZoneConfig                                 = 13;
           preambleReceivedTargetPower                               = -96;
 #preamblTransMax (0...10) = (3,4,5,6,7,8,10,20,50,100,200)