Index: trunk/BNC/src/src.pri
===================================================================
--- trunk/BNC/src/src.pri	(revision 10900)
+++ trunk/BNC/src/src.pri	(revision 10914)
@@ -2,4 +2,9 @@
 unix:DEFINES  += _TTY_POSIX_
 win32:DEFINES += _TTY_WIN_
+
+# to solve error C2872: 'byte': ambiguous symbol
+# in C++17 type std::byte is introduced
+# in Windows SDK byte is defined via typedef unsigned char byte
+win32:DEFINES += _HAS_STD_BYTE 0
 
 RESOURCES += bnc.qrc