diff --git a/CMakeLists.txt b/CMakeLists.txt
index ca5cb158c9..c597d5b586 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -33,6 +33,8 @@ if (ccache_binary)
   set_property(GLOBAL PROPERTY RULE_LAUNCH_COMPILE "${ccache_binary}")
 endif()
 
+set(CMAKE_CXX_EXTENSIONS OFF)
+
 if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "GNU")
   add_compile_options(-fdiagnostics-color=always)
 elseif ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")