diff --git a/xor.go b/xor.go
index ea13cb6..2f86c33 100644
--- a/xor.go
+++ b/xor.go
@@ -1,4 +1,4 @@
-//go:build 1.20
+//go:build go1.20
 
 package srp
 
diff --git a/xor_compat.go b/xor_compat.go
index a137473..c4f3de3 100644
--- a/xor_compat.go
+++ b/xor_compat.go
@@ -1,4 +1,4 @@
-//go:build !1.20
+//go:build !go1.20
 
 package srp