diff --git a/Modules/Compiler/AppleClang-CXX.cmake b/Modules/Compiler/AppleClang-CXX.cmake
index 5194da4..27e4d8a 100644
--- a/Modules/Compiler/AppleClang-CXX.cmake
+++ b/Modules/Compiler/AppleClang-CXX.cmake
@@ -13,7 +13,10 @@ if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 4.0)
   set(CMAKE_CXX11_EXTENSION_COMPILE_OPTION "-std=gnu++11")
 endif()
 
-if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.1)
+if(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 6.0)
+  set(CMAKE_CXX14_STANDARD_COMPILE_OPTION "-std=c++14")
+  set(CMAKE_CXX14_EXTENSION_COMPILE_OPTION "-std=gnu++14")
+elseif(NOT CMAKE_CXX_COMPILER_VERSION VERSION_LESS 5.1)
   # AppleClang 5.0 knows this flag, but does not set a __cplusplus macro greater than 201103L
   set(CMAKE_CXX14_STANDARD_COMPILE_OPTION "-std=c++1y")
   set(CMAKE_CXX14_EXTENSION_COMPILE_OPTION "-std=gnu++1y")