diff --git a/mldsa/compress.go b/mldsa/compress.go
index 343f830..37f8e5d 100644
--- a/mldsa/compress.go
+++ b/mldsa/compress.go
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a MIT-style
 // license that can be found in the LICENSE file.
 
+//go:build go1.24
+
 package mldsa
 
 import (
diff --git a/mldsa/compress_test.go b/mldsa/compress_test.go
index b319f7b..a60a5fe 100644
--- a/mldsa/compress_test.go
+++ b/mldsa/compress_test.go
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a MIT-style
 // license that can be found in the LICENSE file.
 
+//go:build go1.24
+
 package mldsa
 
 import (
diff --git a/mldsa/encoder.go b/mldsa/encoder.go
index 777b8d1..938c56f 100644
--- a/mldsa/encoder.go
+++ b/mldsa/encoder.go
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a MIT-style
 // license that can be found in the LICENSE file.
 
+//go:build go1.24
+
 package mldsa
 
 import (
diff --git a/mldsa/field.go b/mldsa/field.go
index 526bc87..02c7345 100644
--- a/mldsa/field.go
+++ b/mldsa/field.go
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a MIT-style
 // license that can be found in the LICENSE file.
 
+//go:build go1.24
+
 package mldsa
 
 import (
diff --git a/mldsa/field_barrett.go b/mldsa/field_barrett.go
index 3a88114..74494e7 100644
--- a/mldsa/field_barrett.go
+++ b/mldsa/field_barrett.go
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a MIT-style
 // license that can be found in the LICENSE file.
 
+//go:build go1.24
+
 package mldsa
 
 import "math/bits"
diff --git a/mldsa/field_test.go b/mldsa/field_test.go
index 533962b..ea398a4 100644
--- a/mldsa/field_test.go
+++ b/mldsa/field_test.go
@@ -2,6 +2,8 @@
 // Use of this source code is governed by a MIT-style
 // license that can be found in the LICENSE file.
 
+//go:build go1.24
+
 package mldsa
 
 import (