diff --git a/cmake/AwsSIMD.cmake b/cmake/AwsSIMD.cmake
index 65fce96c7..753e53397 100644
--- a/cmake/AwsSIMD.cmake
+++ b/cmake/AwsSIMD.cmake
@@ -18,7 +18,13 @@ else()
     set(AWS_AVX512vL_FLAG "-mavx512vl")
     set(AWS_CLMUL_FLAG "-mpclmul")
     set(AWS_SSE4_2_FLAG "-msse4.2")
-    set(AWS_ARMv8_1_FLAG "-march=armv8-a+crc+crypto -mtune=neoverse-v1")
+
+    check_c_compiler_flag("-mtune=neoverse-v1" HAVE_MTUNE_NEOVERSE_V1)
+    if (HAVE_MTUNE_NEOVERSE_V1)
+        set(AWS_ARMv8_1_FLAG "-march=armv8-a+crc+crypto -mtune=neoverse-v1")
+    else()
+        set(AWS_ARMv8_1_FLAG "-march=armv8-a+crc+crypto")
+    endif()
     set(WERROR_FLAG "-Werror")
 endif()