diff --git a/src_features/generic_tx_parser/gtp_tx_info.c b/src_features/generic_tx_parser/gtp_tx_info.c
index 7913ab08d..cee86f9e0 100644
--- a/src_features/generic_tx_parser/gtp_tx_info.c
+++ b/src_features/generic_tx_parser/gtp_tx_info.c
@@ -55,7 +55,7 @@ static bool handle_version(const s_tlv_data *data, s_tx_info_ctx *context) {
 
 static bool handle_chain_id(const s_tlv_data *data, s_tx_info_ctx *context) {
     uint64_t chain_id;
-    uint8_t buf[sizeof(chain_id)];
+    uint8_t buf[sizeof(chain_id)] = {0};
 
     if (data->length > sizeof(buf)) {
         return false;
@@ -165,7 +165,7 @@ static bool handle_contract_name(const s_tlv_data *data, s_tx_info_ctx *context)
 }
 
 static bool handle_deploy_date(const s_tlv_data *data, s_tx_info_ctx *context) {
-    uint8_t buf[sizeof(uint32_t)];
+    uint8_t buf[sizeof(uint32_t)] = {0};
     time_t timestamp;
 
     if (data->length > sizeof(buf)) {