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-rw-r--r--haddock-api/src/Haddock/Types.hs6
1 files changed, 3 insertions, 3 deletions
diff --git a/haddock-api/src/Haddock/Types.hs b/haddock-api/src/Haddock/Types.hs
index 71139971..e93294a0 100644
--- a/haddock-api/src/Haddock/Types.hs
+++ b/haddock-api/src/Haddock/Types.hs
@@ -343,9 +343,9 @@ instance (NFData a, NFData mod)
DocHeader a -> a `deepseq` ()
-instance NFData Name
-instance NFData OccName
-instance NFData ModuleName
+instance NFData Name where rnf x = seq x ()
+instance NFData OccName where rnf x = seq x ()
+instance NFData ModuleName where rnf x = seq x ()
instance NFData id => NFData (Header id) where
rnf (Header a b) = a `deepseq` b `deepseq` ()