diff --git a/CMakeLists.txt b/CMakeLists.txt
index a91bab5..bdc482f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -64,7 +64,6 @@ set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wall -Wunused-function")
 set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -ggdb")
 
 set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -Wunused-function")
-set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} --std=c++0x")
 # clang compiler need c++11 flag
 if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
   set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -stdlib=libc++")