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