diff --git a/openair1/SIMULATION/TOOLS/multipath_channel.c b/openair1/SIMULATION/TOOLS/multipath_channel.c
index 55bc8d70b8..41b756b54d 100644
--- a/openair1/SIMULATION/TOOLS/multipath_channel.c
+++ b/openair1/SIMULATION/TOOLS/multipath_channel.c
@@ -55,12 +55,12 @@ void __attribute__ ((no_sanitize_address)) multipath_channel(channel_desc_t *des
       tx128_re, tx128_im, ch128_x, ch128_y, pathloss128;
 
   double path_loss = pow(10,desc->path_loss_dB/20);
-  int dd = abs(desc->channel_offset);
+  uint64_t dd = desc->channel_offset;
 
   pathloss128 = simde_mm_set1_pd(path_loss);
 
 #ifdef DEBUG_CH
-  printf("[CHANNEL] keep = %d : path_loss = %g (%f), nb_rx %d, nb_tx %d, dd %d, len %d \n",keep_channel,path_loss,desc->path_loss_dB,desc->nb_rx,desc->nb_tx,dd,desc->channel_length);
+  printf("[CHANNEL] keep = %d : path_loss = %g (%f), nb_rx %d, nb_tx %d, dd %lu, len %d \n",keep_channel,path_loss,desc->path_loss_dB,desc->nb_rx,desc->nb_tx,dd,desc->channel_length);
 #endif
 
   if (keep_channel) {
@@ -184,11 +184,10 @@ void __attribute__ ((no_sanitize_address)) multipath_channel(channel_desc_t *des
 {
 
   double path_loss = pow(10,desc->path_loss_dB/20);
-  int dd;
-  dd = abs(desc->channel_offset);
+  uint64_t dd = desc->channel_offset;
 
 #ifdef DEBUG_CH
-  printf("[CHANNEL] keep = %d : path_loss = %g (%f), nb_rx %d, nb_tx %d, dd %d, len %d \n",
+  printf("[CHANNEL] keep = %d : path_loss = %g (%f), nb_rx %d, nb_tx %d, dd %lu, len %d \n",
          keep_channel, path_loss, desc->path_loss_dB, desc->nb_rx, desc->nb_tx, dd, desc->channel_length);
 #endif
 
diff --git a/openair1/SIMULATION/TOOLS/multipath_tv_channel.c b/openair1/SIMULATION/TOOLS/multipath_tv_channel.c
index ece1f81335..a9967a6eaf 100644
--- a/openair1/SIMULATION/TOOLS/multipath_tv_channel.c
+++ b/openair1/SIMULATION/TOOLS/multipath_tv_channel.c
@@ -29,7 +29,7 @@
 
 void tv_channel(channel_desc_t *desc,double complex ***H,uint32_t length);
 double frand_a_b(double a, double b);
-void tv_conv(double complex **h, double complex *x, double complex *y, uint32_t nb_samples, uint8_t nb_taps, int delay);
+void tv_conv(double complex **h, double complex *x, double complex *y, uint32_t nb_samples, uint8_t nb_taps, uint64_t delay);
 
 void multipath_tv_channel(channel_desc_t *desc,
                           double **tx_sig_re,
@@ -42,10 +42,10 @@ void multipath_tv_channel(channel_desc_t *desc,
 
   double complex **tx,**rx,***H_t;
   double path_loss = pow(10,desc->path_loss_dB/20);
-  int i,j,dd;
-  dd = abs(desc->channel_offset);
+  int i,j;
+  uint64_t dd = desc->channel_offset;
 #ifdef DEBUG_CH
-  printf("[TV CHANNEL] keep = %d : path_loss = %g (%f), nb_rx %d, nb_tx %d, dd %d, len %d max_doppler %g\n",keep_channel,path_loss,desc->path_loss_dB,desc->nb_rx,desc->nb_tx,dd,desc->channel_length,
+  printf("[TV CHANNEL] keep = %d : path_loss = %g (%f), nb_rx %d, nb_tx %d, dd %lu, len %d max_doppler %g\n",keep_channel,path_loss,desc->path_loss_dB,desc->nb_rx,desc->nb_tx,dd,desc->channel_length,
          desc->max_Doppler);
 #endif
   tx = (double complex **)malloc(desc->nb_tx*sizeof(double complex *));
@@ -190,7 +190,7 @@ void tv_channel(channel_desc_t *desc,double complex ***H,uint32_t length){
 }
 
 // time varying convolution
-void tv_conv(double complex **h, double complex *x, double complex *y, uint32_t nb_samples, uint8_t nb_taps, int dd)
+void tv_conv(double complex **h, double complex *x, double complex *y, uint32_t nb_samples, uint8_t nb_taps, uint64_t dd)
 {
   for(int i = 0; i < ((int)nb_samples-dd); i++) {
     for(int j = 0; j < nb_taps; j++) {
diff --git a/radio/rfsimulator/apply_channelmod.c b/radio/rfsimulator/apply_channelmod.c
index 18ab7e29e9..917a22924c 100644
--- a/radio/rfsimulator/apply_channelmod.c
+++ b/radio/rfsimulator/apply_channelmod.c
@@ -68,7 +68,7 @@ void rxAddInput( const c16_t *input_sig,
   // Energy in one sample to calibrate input noise
   // the normalized OAI value seems to be 256 as average amplitude (numerical amplification = 1)
   const double noise_per_sample = pow(10,channelDesc->noise_power_dB/10.0) * 256;
-  const int dd = abs(channelDesc->channel_offset);
+  const uint64_t dd = channelDesc->channel_offset;
   const int nbTx=channelDesc->nb_tx;
 
   for (int i=0; i<nbSamples; i++) {