diff --git a/cpu/cpu_gccgo_x86.c b/cpu/cpu_gccgo_x86.c
index a4605e6..6cc7310 100644
--- a/cpu/cpu_gccgo_x86.c
+++ b/cpu/cpu_gccgo_x86.c
@@ -2,6 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
+//go:build (386 || amd64 || amd64p32) && gccgo
 // +build 386 amd64 amd64p32
 // +build gccgo