diff --git a/Athena.pro b/Athena.pro
index a962781..7e8b17d 100644
--- a/Athena.pro
+++ b/Athena.pro
@@ -146,11 +146,15 @@ HEADERS += \
 OTHER_FILES += \
     .travis.yml
 
+isEmpty(PREFIX) {
+    PREFIX = /usr/local
+}
+
 unix {
-    target.path = /usr/lib
+    target.path = $$PREFIX/lib
     headerFiles.files = $$PWD/include/*
-    headerFiles.path = /usr/include/Athena
+    headerFiles.path = $$PREFIX/include/Athena
     pkgconf.files = libAthena.pc
-    pkgconf.path = /usr/lib/pkgconfig
+    pkgconf.path = $$PREFIX/lib/pkgconfig
     INSTALLS += target headerFiles pkgconf
 }
diff --git a/libAthena.pc b/libAthena.pc
index 184dc0c..7e5b350 100644
--- a/libAthena.pc
+++ b/libAthena.pc
@@ -5,6 +5,6 @@ libdir=${prefix}/lib
 Name: libAthena
 Description: Basic cross platform IO library
 Version: 1.0.0
-Cflags: -I${includedir}/Athena
+Cflags: -I${includedir}/Athena -std=c++11
 Libs: -L${libdir} -lAthena
 Requires: zlib