diff --git a/ghc/compiler/basicTypes/IdInfo.lhs b/ghc/compiler/basicTypes/IdInfo.lhs
index da096ebc19b1da696301c93966c0426ece898be3..8539d005e9b26bb1ef5ec65a567a8fe9f6ae5afa 100644
--- a/ghc/compiler/basicTypes/IdInfo.lhs
+++ b/ghc/compiler/basicTypes/IdInfo.lhs
@@ -47,6 +47,8 @@ module IdInfo (
 
 import {-# SOURCE #-} CoreUnfold ( Unfolding, noUnfolding )
 import {-# SOURCE #-} CoreSyn	 ( SimplifiableCoreExpr )
+-- for mkdependHS, CoreSyn.hi-boot refers to it:
+import BinderInfo ( BinderInfo )
 
 import SpecEnv	        ( SpecEnv, emptySpecEnv, isEmptySpecEnv )
 import BasicTypes	( NewOrData )