diff --git a/examples/echo_server/Makefile b/examples/echo_server/Makefile
index 74a5e3f778..5d34ad2e4b 100644
--- a/examples/echo_server/Makefile
+++ b/examples/echo_server/Makefile
@@ -1,7 +1,8 @@
 BOOST_LIB_PATH		?= /usr/local/lib
 BOOST_INCLUDE_PATH ?= /usr/local/include
+CPP11               ?= 
 
-CFLAGS = -O2 -I$(BOOST_INCLUDE_PATH)
+CFLAGS = -O2 $(CPP11) -I$(BOOST_INCLUDE_PATH)
 LDFLAGS = -L$(BOOST_LIB_PATH)
 
 CXX		?= c++