diff --git a/crypto/secp256k1/panic_cb.go b/crypto/secp256k1/panic_cb.go
index 262846fd8..5da2bea37 100644
--- a/crypto/secp256k1/panic_cb.go
+++ b/crypto/secp256k1/panic_cb.go
@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 
-// +build !gofuzz cgo
+// +build !gofuzz
+// +build cgo
 
 package secp256k1
 
diff --git a/crypto/secp256k1/scalar_mult_cgo.go b/crypto/secp256k1/scalar_mult_cgo.go
index 34998ad1a..f28a1c782 100644
--- a/crypto/secp256k1/scalar_mult_cgo.go
+++ b/crypto/secp256k1/scalar_mult_cgo.go
@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 
-// +build !gofuzz cgo
+// +build !gofuzz
+// +build cgo
 
 package secp256k1
 
diff --git a/crypto/secp256k1/secp256.go b/crypto/secp256k1/secp256.go
index 9e942ac6f..a1bcf7796 100644
--- a/crypto/secp256k1/secp256.go
+++ b/crypto/secp256k1/secp256.go
@@ -2,7 +2,8 @@
 // Use of this source code is governed by a BSD-style license that can be found in
 // the LICENSE file.
 
-// +build !gofuzz cgo
+// +build !gofuzz
+// +build cgo
 
 // Package secp256k1 wraps the bitcoin secp256k1 C library.
 package secp256k1