diff --git a/internal/sm2ec/p256_asm_arm64.s b/internal/sm2ec/p256_asm_arm64.s
index 398bde4..6eb493a 100644
--- a/internal/sm2ec/p256_asm_arm64.s
+++ b/internal/sm2ec/p256_asm_arm64.s
@@ -4,7 +4,7 @@
 //                          256-bit primes"
 // http://link.springer.com/article/10.1007%2Fs13389-014-0090-x
 // https://eprint.iacr.org/2013/816.pdf
-//go:build arm64 && !purego
+//go:build !purego
 
 #include "textflag.h"
 
diff --git a/internal/subtle/xor_amd64.go b/internal/subtle/xor_amd64.go
index fb6bccb..c5c4ed1 100644
--- a/internal/subtle/xor_amd64.go
+++ b/internal/subtle/xor_amd64.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 //
-//go:build amd64 && !purego
+//go:build !purego
 
 package subtle
 
diff --git a/internal/subtle/xor_amd64.s b/internal/subtle/xor_amd64.s
index f2dfa15..009e9c4 100644
--- a/internal/subtle/xor_amd64.s
+++ b/internal/subtle/xor_amd64.s
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 //
-//go:build amd64 && !purego
+//go:build !purego
 
 #include "textflag.h"
 
diff --git a/internal/subtle/xor_arm64.go b/internal/subtle/xor_arm64.go
index 912678e..6fbacf9 100644
--- a/internal/subtle/xor_arm64.go
+++ b/internal/subtle/xor_arm64.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 //
-//go:build arm64 && !purego
+//go:build !purego
 
 package subtle
 
diff --git a/internal/subtle/xor_arm64.s b/internal/subtle/xor_arm64.s
index 1454ab1..8f7ac7f 100644
--- a/internal/subtle/xor_arm64.s
+++ b/internal/subtle/xor_arm64.s
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 //
-//go:build arm64 && !purego
+//go:build !purego
 
 #include "textflag.h"
 
diff --git a/internal/subtle/xor_generic.go b/internal/subtle/xor_generic.go
index 2d7f1d5..e9db8d8 100644
--- a/internal/subtle/xor_generic.go
+++ b/internal/subtle/xor_generic.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 //
-//go:build !amd64 && !arm64 || purego
+//go:build purego || !(amd64 || arm64)
 
 package subtle