diff --git a/build/CMakeLists.txt b/build/CMakeLists.txt
index 7ba71b3c..6be27497 100644
--- a/build/CMakeLists.txt
+++ b/build/CMakeLists.txt
@@ -288,7 +288,7 @@ endif ()
 link_directories(${CMAKE_CURRENT_BINARY_DIR}/zlib/lib ${ZLIB_ROOT}/lib)
 
 # load includes
-include_directories( ${Boost_INCLUDE_DIRS} ${OPENSSL_INCLUDE_DIR} ${ZLIB_INCLUDE_DIR} )
+include_directories( SYSTEM ${Boost_INCLUDE_DIRS} ${OPENSSL_INCLUDE_DIR} ${ZLIB_INCLUDE_DIR} )
 
 # show summary
 message(STATUS "---------------------------------------")