diff --git a/Athena.pro b/Athena.pro
index 58b1fad..29a718c 100644
--- a/Athena.pro
+++ b/Athena.pro
@@ -1,7 +1,7 @@
-CONFIG += staticlib c++11 c11
+CONFIG += staticlib c++11
 TEMPLATE= lib
 DESTDIR = ./lib
-unix:QMAKE_CXXFLAGS += c++11 c11
+unix:QMAKE_CXXFLAGS += -std=c++11
 
 # Uncomment this if you wish to use Qt with libAthena
 #DEFINES += ATHENA_USE_QT