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-rw-r--r--compiler/types/Unify.hs2
1 files changed, 2 insertions, 0 deletions
diff --git a/compiler/types/Unify.hs b/compiler/types/Unify.hs
index cb21899d3e..5fba83fef5 100644
--- a/compiler/types/Unify.hs
+++ b/compiler/types/Unify.hs
@@ -26,6 +26,8 @@ module Unify (
#include "HsVersions.h"
+import GhcPrelude
+
import Var
import VarEnv
import VarSet