diff --git a/libs/main/core/pibase.h b/libs/main/core/pibase.h
index 5531fd43..0a44cf74 100644
--- a/libs/main/core/pibase.h
+++ b/libs/main/core/pibase.h
@@ -246,6 +246,10 @@
    extern char ** environ;
 #endif
 
+#ifndef NO_UNUSED
+#  define NO_UNUSED(x) (void)x
+#endif
+
 #ifndef assert
 #  define assert(x)
 #  define assertm(exp, msg)
diff --git a/libs/main/core/pibytearray.h b/libs/main/core/pibytearray.h
index 1c4a8a22..da738b30 100644
--- a/libs/main/core/pibytearray.h
+++ b/libs/main/core/pibytearray.h
@@ -272,8 +272,8 @@ inline PIByteArray::StreamRef operator <<(PIByteArray & s, const T & v) {
 PIP_EXPORT PIByteArray & operator <<(PIByteArray & s, const PIByteArray & v);
 
 //! \relatesalso PIByteArray
-//! \~english Store operator, see \ref PIByteArray_sec1 for details
-//! \~russian Оператор сохранения, подробнее в \ref PIByteArray_sec1
+//! \~english Store operator
+//! \~russian Оператор сохранения
 inline PIByteArray & operator <<(PIByteArray & s, const PIByteArray::RawData & v) {
 	int os = s.size_s();
 	if (v.s > 0) {
@@ -406,8 +406,8 @@ inline PIByteArray::StreamRef operator >>(PIByteArray & s, T & v) {
 PIP_EXPORT PIByteArray & operator >>(PIByteArray & s, PIByteArray & v);
 
 //! \relatesalso PIByteArray
-//! \~english Restore operator, see \ref PIByteArray_sec1 for details
-//! \~russian Оператор извлечения, подробнее в \ref PIByteArray_sec1
+//! \~english Restore operator
+//! \~russian Оператор извлечения
 inline PIByteArray & operator >>(PIByteArray & s, PIByteArray::RawData v) {
 	if (s.size_s() < v.s) {
 		printf("error with RawData %d < %d\n", (int)s.size_s(), v.s);
diff --git a/libs/main/io_devices/pigpio.cpp b/libs/main/io_devices/pigpio.cpp
index 1e678f90..722ce17d 100644
--- a/libs/main/io_devices/pigpio.cpp
+++ b/libs/main/io_devices/pigpio.cpp
@@ -220,6 +220,7 @@ void PIGPIO::initPin(int gpio_num, Direction dir) {
 	}
 	g.dir = dir;
 	int ret = 0;
+	NO_UNUSED(ret);
 	switch(dir) {
 	case In:
 		ret = system(("echo in >> /sys/class/gpio/" + g.name + "/direction").dataAscii());
@@ -239,6 +240,7 @@ void PIGPIO::pinSet(int gpio_num, bool value) {
 	PIMutexLocker ml(mutex);
 	GPIOData & g(gpio_[gpio_num]);
 	int ret = 0;
+	NO_UNUSED(ret);
 	if (g.fd != -1) {
 		if (value) ret = ::write(g.fd, "1", 1);
 		else ret = ::write(g.fd, "0", 1);