diff --git a/ghc/compiler/basicTypes/BasicTypes.lhs b/ghc/compiler/basicTypes/BasicTypes.lhs
index 5045c784e28a90bcf0571819d54a2f647c6a0b88..11c16feff7de1d066103e7a78aa3208b17269d8e 100644
--- a/ghc/compiler/basicTypes/BasicTypes.lhs
+++ b/ghc/compiler/basicTypes/BasicTypes.lhs
@@ -34,7 +34,7 @@ import Outputable
 Used as a placeholder in types.
 
 \begin{code}
-type Unused = Void
+type Unused = ()
 
 unused :: Unused
 unused = error "Unused is used!"