diff --git a/libzelda.pro b/libzelda.pro
index a789bae..6fa46c9 100644
--- a/libzelda.pro
+++ b/libzelda.pro
@@ -12,7 +12,7 @@ CONFIG(release, release|debug){
     unix:TARGET=zelda
 }
 
-QMAKE_CXXFLAGS += -std=c++0x
+QMAKE_CXXFLAGS = -std=c++0x
 INCLUDEPATH += include
 
 HEADERS += \