diff --git a/Utility/DataUnits.hs b/Utility/DataUnits.hs
index 3ff5538877..2ece143055 100644
--- a/Utility/DataUnits.hs
+++ b/Utility/DataUnits.hs
@@ -41,6 +41,7 @@ module Utility.DataUnits (
 	memoryUnits,
 	bandwidthUnits,
 	oldSchoolUnits,
+	Unit(..),
 
 	roughSize,
 	compareSizes,