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-rw-r--r--utils/hpc/HpcFlags.hs2
1 files changed, 1 insertions, 1 deletions
diff --git a/utils/hpc/HpcFlags.hs b/utils/hpc/HpcFlags.hs
index 3147af8a48..30d46799f1 100644
--- a/utils/hpc/HpcFlags.hs
+++ b/utils/hpc/HpcFlags.hs
@@ -110,7 +110,7 @@ postInvertOpt = noArg "post-invert" "invert output; ticked becomes unticked, unt
$ \ f -> f { funTotals = True }
-------------------------------------------------------------------------------
-readMixWithFlags :: Flags -> TixModule -> IO Mix
+readMixWithFlags :: Flags -> Either String TixModule -> IO Mix
readMixWithFlags flags mod = readMix [ dir ++ "/" ++ hpcDir flags
| dir <- srcDirs flags
] mod