diff --git a/AfRApay.MateCard/src/wifiFix.cpp b/AfRApay.MateCard/src/wifiFix.cpp
index d53c907..ced4966 100644
--- a/AfRApay.MateCard/src/wifiFix.cpp
+++ b/AfRApay.MateCard/src/wifiFix.cpp
@@ -6,7 +6,7 @@
 
 void WiFiClientFixed::flush() {
 	int res;
-	size_t a = available();
+	size_t a = available(), toRead = 0;
 	if (!a) {
 		return;//nothing to flush
 	}
@@ -17,7 +17,8 @@ void WiFiClientFixed::flush() {
 	while (a) {
 		// override broken WiFiClient flush method, ref https://github.com/espressif/arduino-esp32/issues/6129#issuecomment-1237417915
 		//res = recv(fd(), buf, toRead, MSG_DONTWAIT);
-		res = read(buf, a);
+		Serial.println(a);
+		res = read(buf, min(a, (size_t)WIFI_CLIENT_FLUSH_BUFFER_SIZE));
 		if (res < 0) {
 			log_e("fail on fd %d, errno: %d, \"%s\"", fd(), errno, strerror(errno));
 			stop();