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-rw-r--r--compiler/GHC/Unit/Module/ModGuts.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/compiler/GHC/Unit/Module/ModGuts.hs b/compiler/GHC/Unit/Module/ModGuts.hs
index d54e836d71..9f14ba9165 100644
--- a/compiler/GHC/Unit/Module/ModGuts.hs
+++ b/compiler/GHC/Unit/Module/ModGuts.hs
@@ -52,7 +52,7 @@ data ModGuts
mg_exports :: ![AvailInfo], -- ^ What it exports
mg_deps :: !Dependencies, -- ^ What it depends on, directly or
-- otherwise
- mg_usages :: ![Usage], -- ^ What was used? Used for interfaces.
+ mg_usages :: !(Maybe [Usage]), -- ^ What was used? Used for interfaces.
mg_used_th :: !Bool, -- ^ Did we run a TH splice?
mg_rdr_env :: !GlobalRdrEnv, -- ^ Top-level lexical environment