diff --git a/make/autoconf/flags.m4 b/make/autoconf/flags.m4
index 9b15c4edd94..2811d49cd97 100644
--- a/make/autoconf/flags.m4
+++ b/make/autoconf/flags.m4
@@ -236,7 +236,9 @@ AC_DEFUN_ONCE([FLAGS_PRE_TOOLCHAIN],
   if test "x$TOOLCHAIN_TYPE" = xxlc; then
     MACHINE_FLAG="-q${OPENJDK_TARGET_CPU_BITS}"
   elif test "x$TOOLCHAIN_TYPE" != xmicrosoft; then
-    MACHINE_FLAG="-m${OPENJDK_TARGET_CPU_BITS}"
+    if test "x$OPENJDK_TARGET_CPU" != xaarch64; then
+      MACHINE_FLAG="-m${OPENJDK_TARGET_CPU_BITS}"
+    fi
   fi
 
   # FIXME: global flags are not used yet...