diff --git a/cpu/cpu_linux.go b/cpu/cpu_linux.go
index 76b5f507..10e712dc 100644
--- a/cpu/cpu_linux.go
+++ b/cpu/cpu_linux.go
@@ -2,7 +2,7 @@
 // Use of this source code is governed by a BSD-style
 // license that can be found in the LICENSE file.
 
-//+build !amd64,!amd64p32,!386
+// +build !amd64,!amd64p32,!386
 
 package cpu