diff --git a/Makefile b/Makefile
index 8e24093..db47924 100644
--- a/Makefile
+++ b/Makefile
@@ -1,4 +1,5 @@
-CXX=g++ -std=c++11
+CXX=g++
+CXX_FLAGS=-std=c++11
 
 CAPNP_SOURCES=\
 	src/capnp/AnyPointer.java\