diff --git a/crypto/keccak/keccakf_amd64_bmi2.s b/crypto/keccak/keccakf_amd64_bmi2.s
index 52a6ba6a10..fa3e1c33ae 100644
--- a/crypto/keccak/keccakf_amd64_bmi2.s
+++ b/crypto/keccak/keccakf_amd64_bmi2.s
@@ -1,6 +1,6 @@
 // Code generated by gen_keccakf_bmi2.go. DO NOT EDIT.
 
-//go:build !purego && amd64
+//go:build amd64 && !purego
 
 #include "textflag.h"
 
diff --git a/crypto/keccak/‎gen_keccakf_bmi2.go b/crypto/keccak/‎gen_keccakf_bmi2.go
index e322537a66..457bc7bfcb 100644
--- a/crypto/keccak/‎gen_keccakf_bmi2.go
+++ b/crypto/keccak/‎gen_keccakf_bmi2.go
@@ -66,7 +66,7 @@ func main() {
 
 	p("// Code generated by gen_keccakf_bmi2.go. DO NOT EDIT.")
 	p("")
-	p("//go:build !purego")
+	p("//go:build amd64 && !purego")
 	p("")
 	p("#include \"textflag.h\"")
 	p("")