diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6f3415b..f2a548b 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -83,7 +83,7 @@ else()
   endif()
 endif()
 
-if (CMAKE_CXX_COMPILER MATCHES ".*clang")
+if ("${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
 
   option(USE_LIBCXX "Use clang's libcxx" TRUE)