diff --git a/llvm-ffi.cabal b/llvm-ffi.cabal
--- a/llvm-ffi.cabal
+++ b/llvm-ffi.cabal
@@ -1,6 +1,6 @@
 Cabal-Version: 2.2
 Name:          llvm-ffi
-Version:       3.9.0
+Version:       3.9.1
 License:       BSD-3-Clause
 License-File:  LICENSE
 Synopsis:      FFI bindings to the LLVM compiler toolkit.
@@ -97,7 +97,7 @@
   Location: http://hub.darcs.net/thielema/llvm-ffi/
 
 Source-Repository this
-  Tag:      3.9.0
+  Tag:      3.9.1
   Type:     darcs
   Location: http://hub.darcs.net/thielema/llvm-ffi/
 
diff --git a/src/LLVM/FFI/Support/Host.hs b/src/LLVM/FFI/Support/Host.hs
--- a/src/LLVM/FFI/Support/Host.hs
+++ b/src/LLVM/FFI/Support/Host.hs
@@ -4,6 +4,10 @@
 {-# LANGUAGE DeriveDataTypeable #-}
 
 module LLVM.FFI.Support.Host (
+    FeatureMap,
+    FeatureMapRef,
+    FeatureIterator,
+    FeatureIteratorRef,
     getHostCPUName,
     getHostFeatures,
     freeFeatures,