diff --git a/client/cmdlfawid.c b/client/cmdlfawid.c
index 67c87773e..02a90413c 100644
--- a/client/cmdlfawid.c
+++ b/client/cmdlfawid.c
@@ -395,7 +395,8 @@ static int CmdAWIDClone(const char *Cmd) {
             conn.block_after_ACK = false;
         }
         clearCommandBuffer();
-        SendCommandMIX(CMD_T55XX_WRITE_BLOCK, blocks[i], i, 0, NULL, 0);
+        uint8_t data[] = {0};
+        SendCommandMIX(CMD_T55XX_WRITE_BLOCK, blocks[i], i, 0, data, sizeof(data));
         if (!WaitForResponseTimeout(CMD_ACK, &resp, T55XX_WRITE_TIMEOUT)) {
             PrintAndLogEx(WARNING, "Error occurred, device did not respond during write operation.");
             return -1;
diff --git a/client/cmdlffdx.c b/client/cmdlffdx.c
index d8bdb819f..ca1337adc 100644
--- a/client/cmdlffdx.c
+++ b/client/cmdlffdx.c
@@ -291,7 +291,8 @@ static int CmdFdxClone(const char *Cmd) {
             conn.block_after_ACK = false;
         }
         clearCommandBuffer();
-        SendCommandMIX(CMD_T55XX_WRITE_BLOCK, blocks[i], i, 0, NULL, 0);
+        uint8_t data[] = {0};
+        SendCommandMIX(CMD_T55XX_WRITE_BLOCK, blocks[i], i, 0, data, sizeof(data));
         if (!WaitForResponseTimeout(CMD_ACK, &resp, T55XX_WRITE_TIMEOUT)) {
             PrintAndLogEx(WARNING, "Error occurred, device did not respond during write operation.");
             return -1;
diff --git a/client/cmdlfguard.c b/client/cmdlfguard.c
index 1d2a6cbf4..fb1310376 100644
--- a/client/cmdlfguard.c
+++ b/client/cmdlfguard.c
@@ -180,7 +180,8 @@ static int CmdGuardClone(const char *Cmd) {
             conn.block_after_ACK = false;
         }
         clearCommandBuffer();
-        SendCommandMIX(CMD_T55XX_WRITE_BLOCK, blocks[i], i, 0, NULL, 0);
+        uint8_t data[] = {0};
+        SendCommandMIX(CMD_T55XX_WRITE_BLOCK, blocks[i], i, 0, data, sizeof(data));
         if (!WaitForResponseTimeout(CMD_ACK, &resp, T55XX_WRITE_TIMEOUT)) {
             PrintAndLogEx(WARNING, "Error occurred, device did not respond during write operation.");
             return -1;
diff --git a/client/cmdlfjablotron.c b/client/cmdlfjablotron.c
index e3e22afa6..a9694c343 100644
--- a/client/cmdlfjablotron.c
+++ b/client/cmdlfjablotron.c
@@ -165,7 +165,8 @@ static int CmdJablotronClone(const char *Cmd) {
             conn.block_after_ACK = false;
         }
         clearCommandBuffer();
-        SendCommandMIX(CMD_T55XX_WRITE_BLOCK, blocks[i], i, 0, NULL, 0);
+        uint8_t data[] = {0};
+        SendCommandMIX(CMD_T55XX_WRITE_BLOCK, blocks[i], i, 0, data, sizeof(data));
         if (!WaitForResponseTimeout(CMD_ACK, &resp, T55XX_WRITE_TIMEOUT)) {
             PrintAndLogEx(WARNING, "Error occurred, device did not respond during write operation.");
             return -1;
diff --git a/client/cmdlfkeri.c b/client/cmdlfkeri.c
index 389b47fc4..1575902f8 100644
--- a/client/cmdlfkeri.c
+++ b/client/cmdlfkeri.c
@@ -156,7 +156,8 @@ static int CmdKeriClone(const char *Cmd) {
             conn.block_after_ACK = false;
         }
         clearCommandBuffer();
-        SendCommandMIX(CMD_T55XX_WRITE_BLOCK, blocks[i], i, 0, NULL, 0);
+        uint8_t data[] = {0};
+        SendCommandMIX(CMD_T55XX_WRITE_BLOCK, blocks[i], i, 0, data, sizeof(data));
         if (!WaitForResponseTimeout(CMD_ACK, &resp, T55XX_WRITE_TIMEOUT)) {
             PrintAndLogEx(WARNING, "Error occurred, device did not respond during write operation.");
             return -1;
diff --git a/client/cmdlfnedap.c b/client/cmdlfnedap.c
index 77d00fb5c..63a869851 100644
--- a/client/cmdlfnedap.c
+++ b/client/cmdlfnedap.c
@@ -212,7 +212,8 @@ static int CmdLFNedapClone(const char *Cmd) {
             conn.block_after_ACK = false;
         }
         clearCommandBuffer();
-        SendCommandMIX(CMD_T55XX_WRITE_BLOCK, blocks[i], i, 0, NULL, 0);
+        uint8_t data[] = {0};
+        SendCommandMIX(CMD_T55XX_WRITE_BLOCK, blocks[i], i, 0, data, sizeof(data));
         if (!WaitForResponseTimeout(CMD_ACK, &resp, T55XX_WRITE_TIMEOUT)){
             PrintAndLogEx(WARNING, "Error occurred, device did not respond during write operation.");
             return -1;
diff --git a/client/cmdlfnoralsy.c b/client/cmdlfnoralsy.c
index 1f1231a51..54a1ebd4c 100644
--- a/client/cmdlfnoralsy.c
+++ b/client/cmdlfnoralsy.c
@@ -164,7 +164,8 @@ static int CmdNoralsyClone(const char *Cmd) {
             conn.block_after_ACK = false;
         }
         clearCommandBuffer();
-        SendCommandMIX(CMD_T55XX_WRITE_BLOCK, blocks[i], i, 0, NULL, 0);
+        uint8_t data[] = {0};
+        SendCommandMIX(CMD_T55XX_WRITE_BLOCK, blocks[i], i, 0, data, sizeof(data));
         if (!WaitForResponseTimeout(CMD_ACK, &resp, T55XX_WRITE_TIMEOUT)) {
             PrintAndLogEx(WARNING, "Error occurred, device did not respond during write operation.");
             return -1;
diff --git a/client/cmdlfpresco.c b/client/cmdlfpresco.c
index 34d144316..999889bcd 100644
--- a/client/cmdlfpresco.c
+++ b/client/cmdlfpresco.c
@@ -130,7 +130,8 @@ static int CmdPrescoClone(const char *Cmd) {
             conn.block_after_ACK = false;
         }
         clearCommandBuffer();
-        SendCommandMIX(CMD_T55XX_WRITE_BLOCK, blocks[i], i, 0, NULL, 0);
+        uint8_t data[] = {0};
+        SendCommandMIX(CMD_T55XX_WRITE_BLOCK, blocks[i], i, 0, data, sizeof(data));
         if (!WaitForResponseTimeout(CMD_ACK, &resp, T55XX_WRITE_TIMEOUT)) {
             PrintAndLogEx(WARNING, "Error occurred, device did not respond during write operation.");
             return -1;
diff --git a/client/cmdlfpyramid.c b/client/cmdlfpyramid.c
index fd3363d8a..abefce26b 100644
--- a/client/cmdlfpyramid.c
+++ b/client/cmdlfpyramid.c
@@ -242,7 +242,8 @@ static int CmdPyramidClone(const char *Cmd) {
             conn.block_after_ACK = false;
         }
         clearCommandBuffer();
-        SendCommandMIX(CMD_T55XX_WRITE_BLOCK, blocks[i], i, 0, NULL, 0);
+        uint8_t data[] = {0};
+        SendCommandMIX(CMD_T55XX_WRITE_BLOCK, blocks[i], i, 0, data, sizeof(data));
         if (!WaitForResponseTimeout(CMD_ACK, &resp, T55XX_WRITE_TIMEOUT)) {
             PrintAndLogEx(WARNING, "Error occurred, device did not respond during write operation.");
             return -1;
diff --git a/client/cmdlfvisa2000.c b/client/cmdlfvisa2000.c
index e6df8cad2..05d127a34 100644
--- a/client/cmdlfvisa2000.c
+++ b/client/cmdlfvisa2000.c
@@ -176,7 +176,8 @@ static int CmdVisa2kClone(const char *Cmd) {
             conn.block_after_ACK = false;
         }
         clearCommandBuffer();
-        SendCommandMIX(CMD_T55XX_WRITE_BLOCK, blocks[i], i, 0, NULL, 0);
+        uint8_t data[] = {0};
+        SendCommandMIX(CMD_T55XX_WRITE_BLOCK, blocks[i], i, 0, data, sizeof(data));
         if (!WaitForResponseTimeout(CMD_ACK, &resp, T55XX_WRITE_TIMEOUT)) {
             PrintAndLogEx(WARNING, "Error occurred, device did not respond during write operation.");
             return -1;