diff --git a/client/cmdusart.c b/client/cmdusart.c
index 8d685f420..7da6d1298 100644
--- a/client/cmdusart.c
+++ b/client/cmdusart.c
@@ -173,7 +173,7 @@ static int usart_txrx(uint8_t *srcdata, size_t srclen, uint8_t *dstdata, size_t
     memcpy(payload.data, srcdata, srclen);
     SendCommandNG(CMD_USART_TXRX, (uint8_t *)&payload, srclen + sizeof(payload.waittime));
     PacketResponseNG resp;
-    if (!WaitForResponseTimeout(CMD_USART_TXRX, &resp, 1000)) {
+    if (!WaitForResponseTimeout(CMD_USART_TXRX, &resp, waittime + 500)) {
         return PM3_ETIMEOUT;
     }
     if (resp.status == PM3_SUCCESS) {