diff --git a/src_main/io/pispi.cpp b/src_main/io/pispi.cpp
index daffedf4..3f68734c 100644
--- a/src_main/io/pispi.cpp
+++ b/src_main/io/pispi.cpp
@@ -23,7 +23,7 @@ PISPI::PISPI(const PIString & path, uint speed, PIIODevice::DeviceMode mode) : P
 	spi_mode = 0;
 	spi_bits = 8;
 #ifndef WINDOWS
-	fd = 0;
+	PRIVATE->fd = 0;
 #endif
 }
 
@@ -36,18 +36,18 @@ void PISPI::setSpeed(uint speed_hz) {
 bool PISPI::openDevice() {
 #ifndef WINDOWS
 	int ret = 0;
-	fd = open(path().dataAscii(), O_RDWR);
-	if (fd < 0) return false;
-	ret = ioctl(fd, SPI_IOC_WR_MODE, &spi_mode);
+	PRIVATE->fd = open(path().dataAscii(), O_RDWR);
+	if (PRIVATE->fd < 0) return false;
+	ret = ioctl(PRIVATE->fd, SPI_IOC_WR_MODE, &spi_mode);
 	if (ret == -1) return false;
-	ret = ioctl(fd, SPI_IOC_WR_BITS_PER_WORD, &spi_bits);
+	ret = ioctl(PRIVATE->fd, SPI_IOC_WR_BITS_PER_WORD, &spi_bits);
 	if (ret == -1) return false;
-	ret = ioctl(fd, SPI_IOC_WR_MAX_SPEED_HZ, &spi_speed);
+	ret = ioctl(PRIVATE->fd, SPI_IOC_WR_MAX_SPEED_HZ, &spi_speed);
 	if (ret == -1) return false;
-	piCout << "SPI open" << device << "speed:" << spi_speed/1000 << "KHz" << "mode" << spi_mode << "bits" << spi_bits;
-	spi_ioc_tr.delay_usecs = 0;
-	spi_ioc_tr.speed_hz = spi_speed;
-	spi_ioc_tr.bits_per_word = spi_bits;
+	piCout << "SPI open" << path() << "speed:" << spi_speed/1000 << "KHz" << "mode" << spi_mode << "bits" << spi_bits;
+	PRIVATE->spi_ioc_tr.delay_usecs = 0;
+	PRIVATE->spi_ioc_tr.speed_hz = spi_speed;
+	PRIVATE->spi_ioc_tr.bits_per_word = spi_bits;
 	return true;
 #else
 	piCoutObj << "PISPI not implemented on windows";
@@ -58,7 +58,7 @@ bool PISPI::openDevice() {
 
 bool PISPI::closeDevice() {
 #ifndef WINDOWS
-	if (fd) close(fd);
+	if (PRIVATE->fd) close(PRIVATE->fd);
 #endif
 	return true;
 }
@@ -78,13 +78,13 @@ int PISPI::writeDevice(const void * data, int max_size) {
 		if (tx_buf.size_s() != max_size) {
 			tx_buf.resize(max_size);
 			rx_buf.resize(max_size);
-			spi_ioc_tr.tx_buf = (ulong)(tx_buf.data());
-			spi_ioc_tr.rx_buf = (ulong)(rx_buf.data());
-			spi_ioc_tr.len = max_size;
+			PRIVATE->spi_ioc_tr.tx_buf = (ulong)(tx_buf.data());
+			PRIVATE->spi_ioc_tr.rx_buf = (ulong)(rx_buf.data());
+			PRIVATE->spi_ioc_tr.len = max_size;
 		}
 		memcpy(tx_buf.data(), data, max_size);
 		int ret;
-		ret = ioctl(fd, SPI_IOC_MESSAGE(1), &spi_ioc_tr);
+		ret = ioctl(PRIVATE->fd, SPI_IOC_MESSAGE(1), &PRIVATE->spi_ioc_tr);
 		if (ret < 1) {piCout << "init can't send spi message" << ret; return -1;}
 		recv_buf.append(rx_buf);
 		return max_size;