diff --git a/crypto/keccak/keccakf_amd64_bmi2.s b/crypto/keccak/keccakf_amd64_bmi2.s
index 1cec6e21b5..52a6ba6a10 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
+//go:build !purego && amd64
 
 #include "textflag.h"