diff --git a/Trace/Hpc/Mix.hs b/Trace/Hpc/Mix.hs
index 709e70c2e2d1fa44de49d23d6ba9b9f2afb92118..6c31f8303bdbca52f808573795240563b9c46976 100644
--- a/Trace/Hpc/Mix.hs
+++ b/Trace/Hpc/Mix.hs
@@ -22,7 +22,7 @@ module Trace.Hpc.Mix
         )
   where
 
-import Data.List
+import Data.List (intercalate)
 import Data.Maybe (catMaybes, fromMaybe)
 import Data.Time (UTCTime)
 import Data.Tree