diff --git a/build/src.pro b/build/src.pro
index 32bc237..e1a3a4b 100644
--- a/build/src.pro
+++ b/build/src.pro
@@ -2,6 +2,7 @@ TEMPLATE = lib
 TARGET = ipc
 
 CONFIG -= qt
+CONFIG += c++1z # may be useless
 
 msvc:QMAKE_CXXFLAGS += /std:c++17
 else:QMAKE_CXXFLAGS += -std=gnu++1z
diff --git a/build/test.pro b/build/test.pro
index 5987ff1..0c3c572 100644
--- a/build/test.pro
+++ b/build/test.pro
@@ -2,7 +2,7 @@ TEMPLATE = app
 
 QT += core testlib
 QT -= gui
-CONFIG += console
+CONFIG += console c++1z
 CONFIG -= app_bundle
 
 msvc:QMAKE_CXXFLAGS += /std:c++17