diff --git a/make/autoconf/flags-cflags.m4 b/make/autoconf/flags-cflags.m4
index e80d9a98957db..07d9ac11f679f 100644
--- a/make/autoconf/flags-cflags.m4
+++ b/make/autoconf/flags-cflags.m4
@@ -741,7 +741,7 @@ AC_DEFUN([FLAGS_SETUP_CFLAGS_CPU_DEP],
         $1_CFLAGS_CPU_JVM="${$1_CFLAGS_CPU_JVM} -DABI_ELFv2"
       fi
     elif test "x$FLAGS_CPU" = xs390x; then
-      $1_CFLAGS_CPU="-mbackchain -march=z10"
+      $1_CFLAGS_CPU="-mbackchain -march=z13"
     fi
 
     if test "x$FLAGS_CPU_ARCH" != xarm &&  test "x$FLAGS_CPU_ARCH" != xppc; then