diff --git a/lib/include/srslte/common/metrics_hub.h b/lib/include/srslte/common/metrics_hub.h
index a73f3d90e..46107db34 100644
--- a/lib/include/srslte/common/metrics_hub.h
+++ b/lib/include/srslte/common/metrics_hub.h
@@ -63,7 +63,8 @@ private:
     get_time_interval(sleep_period_start);
     uint32_t period = sleep_period_start[0].tv_sec*1e6 + sleep_period_start[0].tv_usec;
     if (m) {
-      metrics_t metric = {};
+      metrics_t metric;
+      bzero(&metric, sizeof(metrics_t));
       m->get_metrics(metric);
       for (uint32_t i=0;i<listeners.size();i++) {
         listeners[i]->set_metrics(metric, period);
diff --git a/lib/src/phy/phch/test/pdcch_test.c b/lib/src/phy/phch/test/pdcch_test.c
index 416405c49..18f563ab8 100644
--- a/lib/src/phy/phch/test/pdcch_test.c
+++ b/lib/src/phy/phch/test/pdcch_test.c
@@ -147,7 +147,7 @@ typedef struct {
 
 int main(int argc, char **argv) {
   srslte_pdcch_t pdcch_tx, pdcch_rx;
-  testcase_dci_t testcases[10] = {};
+  testcase_dci_t testcases[10];
   srslte_ra_dl_dci_t ra_dl;
   srslte_regs_t regs;
   int i, j, k;
diff --git a/srsue/hdr/upper/rrc.h b/srsue/hdr/upper/rrc.h
index a381940ec..ee1c9e058 100644
--- a/srsue/hdr/upper/rrc.h
+++ b/srsue/hdr/upper/rrc.h
@@ -108,7 +108,8 @@ class cell_t
   }
 
   cell_t() {
-    phy_interface_rrc::phy_cell_t tmp = {};
+    phy_interface_rrc::phy_cell_t tmp;
+    ZERO_OBJECT(tmp);
     cell_t(tmp, 0);
   }
   cell_t(phy_interface_rrc::phy_cell_t phy_cell, float rsrp) {
diff --git a/srsue/src/phy/phch_worker.cc b/srsue/src/phy/phch_worker.cc
index 746a7e430..a18fbb598 100644
--- a/srsue/src/phy/phch_worker.cc
+++ b/srsue/src/phy/phch_worker.cc
@@ -251,12 +251,16 @@ void phch_worker::work_imp()
   bool ul_grant_available = false;
   bool dl_ack[SRSLTE_MAX_CODEWORDS] = {false};
 
-  mac_interface_phy::mac_grant_t    dl_mac_grant = {};
-  mac_interface_phy::tb_action_dl_t dl_action = {};
+  mac_interface_phy::mac_grant_t    dl_mac_grant;
+  mac_interface_phy::tb_action_dl_t dl_action;
 
-  mac_interface_phy::mac_grant_t    ul_mac_grant = {};
-  mac_interface_phy::tb_action_ul_t ul_action = {};
+  mac_interface_phy::mac_grant_t    ul_mac_grant;
+  mac_interface_phy::tb_action_ul_t ul_action;
 
+  ZERO_OBJECT(dl_mac_grant);
+  ZERO_OBJECT(dl_action);
+  ZERO_OBJECT(ul_mac_grant);
+  ZERO_OBJECT(ul_action);
 
   /** Calculate RSSI on the input signal before generating the output */
 
diff --git a/srsue/src/upper/nas.cc b/srsue/src/upper/nas.cc
index c4f7a4584..4df7d5c31 100644
--- a/srsue/src/upper/nas.cc
+++ b/srsue/src/upper/nas.cc
@@ -1244,7 +1244,8 @@ void nas::send_esm_information_response(const uint8 proc_transaction_id) {
                    16 /* data value */ +
                    cfg.user.length();
 
-    uint8_t challenge[len] = {};
+    uint8_t challenge[len];
+    bzero(challenge, len*sizeof(uint8_t));
     challenge[0] = 0x01; // challenge code
     challenge[1] = chap_id; // ID
     challenge[2] = (len >> 8) & 0xff;
@@ -1263,7 +1264,8 @@ void nas::send_esm_information_response(const uint8 proc_transaction_id) {
     }
 
     // Generate response
-    uint8_t response[len] = {};
+    uint8_t response[len];
+    bzero(response, len*sizeof(uint8_t));
     response[0] = 0x02; // response code
     response[1] = chap_id;
     response[2] = (len >> 8) & 0xff;