diff --git a/units.go b/units.go
index c60d1b5..0368650 100644
--- a/units.go
+++ b/units.go
@@ -18,7 +18,10 @@
 package libvirt
 
 const (
+    // B - byte
 	B   = 1
+    // KiB - kibibyte
 	KiB = 1024 * B
+    // MiB - mebibyte
 	MiB = 1024 * KiB
 )