diff --git a/openair1/PHY/NR_UE_ESTIMATION/nr_dl_channel_estimation.c b/openair1/PHY/NR_UE_ESTIMATION/nr_dl_channel_estimation.c
index 2de95698dd..a84b2122f7 100644
--- a/openair1/PHY/NR_UE_ESTIMATION/nr_dl_channel_estimation.c
+++ b/openair1/PHY/NR_UE_ESTIMATION/nr_dl_channel_estimation.c
@@ -52,9 +52,9 @@ int nr_prs_channel_estimation(uint8_t gNB_id,
   int32_t **rxdataF      = ue->common_vars.common_vars_rx_data_per_thread[proc->thread_id].rxdataF;
   prs_config_t *prs_cfg  = &ue->prs_vars[gNB_id]->prs_resource[rsc_id].prs_cfg;
   prs_meas_t **prs_meas  = ue->prs_vars[gNB_id]->prs_resource[rsc_id].prs_meas;
-  c16_t ch_tmp_buf[ ue->frame_parms.ofdm_symbol_size];
-  int32_t chF_interpol[frame_params->nb_antennas_rx][NR_PRS_IDFT_OVERSAMP_FACTOR*ue->frame_parms.ofdm_symbol_size];
-  int32_t chT_interpol[frame_params->nb_antennas_rx][NR_PRS_IDFT_OVERSAMP_FACTOR*ue->frame_parms.ofdm_symbol_size];
+  c16_t ch_tmp_buf[ ue->frame_parms.ofdm_symbol_size] __attribute__((aligned(32)));
+  int32_t chF_interpol[frame_params->nb_antennas_rx][NR_PRS_IDFT_OVERSAMP_FACTOR*ue->frame_parms.ofdm_symbol_size] __attribute__((aligned(32)));
+  int32_t chT_interpol[frame_params->nb_antennas_rx][NR_PRS_IDFT_OVERSAMP_FACTOR*ue->frame_parms.ofdm_symbol_size] __attribute__((aligned(32)));
   memset(ch_tmp_buf,0,sizeof(ch_tmp_buf));
   memset(chF_interpol,0,sizeof(chF_interpol));
   memset(chT_interpol,0,sizeof(chF_interpol));