diff --git a/gcc/go/gofrontend/MERGE b/gcc/go/gofrontend/MERGE
index 1a89ddabf9e..00b5cccd80c 100644
--- a/gcc/go/gofrontend/MERGE
+++ b/gcc/go/gofrontend/MERGE
@@ -1,4 +1,4 @@
-cf91720c650f2cdbd8153a5a5f048793cfab3966
+d51890dc96a2a33484623728bdc8ac258645e9cc
 
 The first line of this file holds the git revision number of the last
 merge done from the gofrontend repository.
diff --git a/libgo/go/crypto/aes/cbc_s390x.go b/libgo/go/crypto/aes/cbc_s390x.go
index 427b30b2a70..8346b5eea01 100644
--- a/libgo/go/crypto/aes/cbc_s390x.go
+++ b/libgo/go/crypto/aes/cbc_s390x.go
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
+
 package aes
 
 import (
diff --git a/libgo/go/crypto/aes/ctr_s390x.go b/libgo/go/crypto/aes/ctr_s390x.go
index 94dea5ccdfe..ae09dbadaf4 100644
--- a/libgo/go/crypto/aes/ctr_s390x.go
+++ b/libgo/go/crypto/aes/ctr_s390x.go
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
+
 package aes
 
 import (
diff --git a/libgo/go/hash/crc32/crc32_s390x.go b/libgo/go/hash/crc32/crc32_s390x.go
index 2f206903898..b8a580870c5 100644
--- a/libgo/go/hash/crc32/crc32_s390x.go
+++ b/libgo/go/hash/crc32/crc32_s390x.go
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+// +build ignore
+
 package crc32
 
 import (