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-rw-r--r--haddock-api/src/Haddock/InterfaceFile.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/haddock-api/src/Haddock/InterfaceFile.hs b/haddock-api/src/Haddock/InterfaceFile.hs
index 054c1384..31881c76 100644
--- a/haddock-api/src/Haddock/InterfaceFile.hs
+++ b/haddock-api/src/Haddock/InterfaceFile.hs
@@ -158,7 +158,7 @@ writeInterfaceFile filename iface = do
type NameCacheAccessor m = (m NameCache, NameCache -> m ())
-nameCacheFromGhc :: NameCacheAccessor Ghc
+nameCacheFromGhc :: forall m. (GhcMonad m, MonadIO m) => NameCacheAccessor m
nameCacheFromGhc = ( read_from_session , write_to_session )
where
read_from_session = do