diff --git a/build-support/macros-and-definitions.cmake b/build-support/macros-and-definitions.cmake
index b8599fdbf..8d76a7e15 100644
--- a/build-support/macros-and-definitions.cmake
+++ b/build-support/macros-and-definitions.cmake
@@ -555,11 +555,6 @@ macro(process_options)
 
     if(${EIGEN3_FOUND})
       set(ENABLE_EIGEN True)
-      # Prevent warning as error for ARM NEON PacketMath
-      if("${CMAKE_SYSTEM_PROCESSOR}" STREQUAL "aarch64")
-        add_compile_options(-Wno-error=class-memaccess)
-      endif()
-
       add_definitions(-DHAVE_EIGEN3)
       add_definitions(-DEIGEN_MPL2_ONLY)
       if(NOT ${NS3_FORCE_LOCAL_DEPENDENCIES})