diff --git a/scripts/cmake/platforms/mps3/build_configuration.cmake b/scripts/cmake/platforms/mps3/build_configuration.cmake
index 6e21d9b..749b1e1 100644
--- a/scripts/cmake/platforms/mps3/build_configuration.cmake
+++ b/scripts/cmake/platforms/mps3/build_configuration.cmake
@@ -22,18 +22,7 @@
         if (TARGET_SUBSYSTEM STREQUAL sse-300)
             set(CMAKE_SYSTEM_PROCESSOR cortex-m55 CACHE STRING "Cortex-M CPU to use")
         elseif(TARGET_SUBSYSTEM STREQUAL sse-310)
-            # For CMake versions older than 3.21, the compiler and linker flags for
-            # ArmClang are added by CMake automatically which makes it mandatory to
-            # define the system processor. For CMake versions 3.21 or later (that
-            # implement policy CMP0123) we use armv8.1-m as the arch until the
-            # toolchain officially supports Cortex-M85. For older version of CMake
-            # we revert to using Cortex-M55 as the processor (as this will work
-            # for M85 too).
-            if(POLICY CMP0123)
-                set(CMAKE_SYSTEM_ARCH armv8.1-m.main CACHE STRING "System arch to use")
-            else()
-                set(CMAKE_SYSTEM_PROCESSOR  cortex-m55)
-            endif()
+            set(CMAKE_SYSTEM_PROCESSOR cortex-m85 CACHE STRING "Cortex-M CPU to use")
         endif()
     endif()