diff --git a/samples/blacksim/sample_blacksim.pro b/samples/blacksim/sample_blacksim.pro
index b3928bf4d..ad0f9bc4c 100644
--- a/samples/blacksim/sample_blacksim.pro
+++ b/samples/blacksim/sample_blacksim.pro
@@ -6,7 +6,7 @@ QT       += core dbus network testlib
 TARGET = sample_blacksim
 TEMPLATE = app
 
-CONFIG   += console c++11
+CONFIG   += console
 CONFIG   -= app_bundle
 CONFIG   += blackmisc blackcore blacksim
 
diff --git a/src/blacksim/blacksim.pro b/src/blacksim/blacksim.pro
index 40ef180de..881ec2986 100644
--- a/src/blacksim/blacksim.pro
+++ b/src/blacksim/blacksim.pro
@@ -6,7 +6,7 @@ QT       += network dbus xml
 TARGET = blacksim
 TEMPLATE = lib
 
-CONFIG += staticlib c++11
+CONFIG += staticlib
 CONFIG += blackmisc
 
 INCLUDEPATH += ..