diff --git a/disk/disk_fallback.go b/disk/disk_fallback.go
index 414f280..22eb507 100644
--- a/disk/disk_fallback.go
+++ b/disk/disk_fallback.go
@@ -1,4 +1,4 @@
-// +build !darwin,!linux,!freebsd,!openbsd,!windows,!solaris openbsd,!amd64
+// +build !darwin,!linux,!freebsd,!openbsd,!windows,!solaris
 
 package disk
 
diff --git a/disk/disk_openbsd.go b/disk/disk_openbsd.go
index 9d7e125..6fdf386 100644
--- a/disk/disk_openbsd.go
+++ b/disk/disk_openbsd.go
@@ -1,4 +1,4 @@
-// +build openbsd,amd64
+// +build openbsd
 
 package disk