diff --git a/I2CController.cpp b/I2CController.cpp
index b44ab03..247129c 100644
--- a/I2CController.cpp
+++ b/I2CController.cpp
@@ -63,7 +63,7 @@ int CI2CController::write(const unsigned char* buffer, unsigned int length)
 #include <fcntl.h>
 #include <unistd.h>
 #include <termios.h>
-#if !defined(__APPLE__)
+#if defined(__linux__)
 #include <linux/i2c-dev.h>
 #endif
 
@@ -81,7 +81,7 @@ bool CI2CController::open()
 {
 	assert(m_fd == -1);
 
-#if !defined(__APPLE__)
+#if defined(__linux__)
 	m_fd = ::open(m_device.c_str(), O_RDWR);
 	if (m_fd < 0) {
 		LogError("Cannot open device - %s", m_device.c_str());
@@ -100,7 +100,7 @@ bool CI2CController::open()
 		return false;
 	}
 #else
-	#warning "I2C controller does not support OSX"
+	#warning "I2C controller supports Linux only"
 #endif
 
 	return true;
@@ -117,7 +117,7 @@ int CI2CController::read(unsigned char* buffer, unsigned int length)
 	unsigned int offset = 0U;
 
 	while (offset < length) {
-#if !defined(__APPLE__)
+#if defined(__linux__)
 		ssize_t n = ::read(m_fd, buffer + offset, 1U);
 		if (n < 0) {
 			if (errno != EAGAIN) {
@@ -145,7 +145,7 @@ int CI2CController::write(const unsigned char* buffer, unsigned int length)
 	unsigned int ptr = 0U;
 	while (ptr < length) {
 		ssize_t n = 0U;
-#if !defined(__APPLE__)
+#if defined(__linux__)
 		n = ::write(m_fd, buffer + ptr, 1U);
 #endif
 		if (n < 0) {