diff --git a/openair1/SIMULATION/NR_PHY/prachsim.c b/openair1/SIMULATION/NR_PHY/prachsim.c
index 8e64d28d38..76eee926e9 100644
--- a/openair1/SIMULATION/NR_PHY/prachsim.c
+++ b/openair1/SIMULATION/NR_PHY/prachsim.c
@@ -115,10 +115,10 @@ int main(int argc, char **argv){
   int i, aa, aarx, **txdata, trial, n_frames = 1, prach_start, rx_prach_start; //, ntrials=1;
   int N_RB_UL = 106, delay = 0, NCS_config = 13, rootSequenceIndex = 1, threequarter_fs = 0, mu = 1, fd_occasion = 0, loglvl = OAILOG_INFO, numRA = 0, prachStartSymbol = 0;
   uint8_t snr1set = 0, ue_speed1set = 0, transmission_mode = 1, n_tx = 1, n_rx = 1, awgn_flag = 0, msg1_frequencystart = 0, num_prach_fd_occasions = 1, prach_format=0;
-  uint8_t frame = 1, subframe = 9, slot=19, slot_gNB=19, config_index = 98, prach_sequence_length = 1, num_root_sequences = 16, restrictedSetConfig = 0, N_dur, N_t_slot, start_symbol;
+  uint8_t frame = 1, slot=19, slot_gNB=19, config_index = 98, prach_sequence_length = 1, num_root_sequences = 16, restrictedSetConfig = 0, N_dur, N_t_slot, start_symbol;
   uint16_t Nid_cell = 0, preamble_tx = 0, preamble_delay, format, format0, format1;
   uint32_t tx_lev = 10000, prach_errors = 0, samp_count; //,tx_lev_dB;
-  uint64_t SSB_positions = 0x01, absoluteFrequencyPointA = 640000;
+  uint64_t SSB_positions = 0x01;
   uint16_t RA_sfn_index;
   uint8_t N_RA_slot;
   uint8_t config_period;
@@ -411,12 +411,12 @@ int main(int argc, char **argv){
 
   nr_phy_config_request_sim(gNB, N_RB_UL, N_RB_UL, mu, Nid_cell, SSB_positions);
 
-  absoluteFrequencyPointA = to_nrarfcn(frame_parms->nr_band,
+  uint64_t absoluteFrequencyPointA = to_nrarfcn(frame_parms->nr_band,
 				       frame_parms->dl_CarrierFreq,
 				       frame_parms->numerology_index,
 				       frame_parms->N_RB_UL*(180e3)*(1 << frame_parms->numerology_index));
 
-  subframe = slot/frame_parms->slots_per_subframe;
+  uint8_t subframe = slot/frame_parms->slots_per_subframe;
   
   if (config_index<67 && mu==1)  { prach_sequence_length=0; slot = subframe*2; slot_gNB = 1+(subframe*2); }
   uint16_t N_ZC = prach_sequence_length == 0 ? 839 : 139;