diff --git a/CMakeLists.txt b/CMakeLists.txt
index ac6fe481f..5dfea223f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -243,18 +243,12 @@ if(NOT MSVC)
   option(EIGEN_TEST_AVX512 "Enable/Disable AVX512 in tests/examples" OFF)
   if(EIGEN_TEST_AVX512)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mavx512f -mfma")
-    if (NOT "${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
-      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fabi-version=6")
-    endif()
     message(STATUS "Enabling AVX512 in tests/examples")
   endif()
 
   option(EIGEN_TEST_AVX512DQ "Enable/Disable AVX512DQ in tests/examples" OFF)
   if(EIGEN_TEST_AVX512DQ)
     set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -mavx512dq")
-    if (NOT "${CMAKE_CXX_COMPILER_ID}" STREQUAL "Clang")
-      set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -fabi-version=6")
-    endif()
     message(STATUS "Enabling AVX512DQ in tests/examples")
   endif()