diff --git a/Modules/Compiler/Clang-CXX.cmake b/Modules/Compiler/Clang-CXX.cmake
index a1b3a104d..0409c241b 100644
--- a/Modules/Compiler/Clang-CXX.cmake
+++ b/Modules/Compiler/Clang-CXX.cmake
@@ -6,7 +6,7 @@ if(NOT CMAKE_CXX_SIMULATE_ID STREQUAL "MSVC")
 endif()
 
 cmake_policy(GET CMP0025 appleClangPolicy)
-if(NOT appleClangPolicy STREQUAL NEW)
+if(APPLE AND NOT appleClangPolicy STREQUAL NEW)
   return()
 endif()