diff --git a/conduit-merge.cabal b/conduit-merge.cabal
--- a/conduit-merge.cabal
+++ b/conduit-merge.cabal
@@ -1,5 +1,5 @@
 name: conduit-merge
-version: 0.1.0.0
+version: 0.1.0.1
 cabal-version: >=1.10
 build-type: Simple
 license: BSD3
diff --git a/src/Data/Conduit/Merge.hs b/src/Data/Conduit/Merge.hs
--- a/src/Data/Conduit/Merge.hs
+++ b/src/Data/Conduit/Merge.hs
@@ -6,6 +6,7 @@
 import Data.Conduit        (Producer, Source, await, newResumableSource, yield, ($$++))
 import Data.List           (sortOn)
 
+-- | Merge multiple sorted source into one sorted producer.
 mergeSources :: (Ord a, Monad m) => [Source m a] -> Producer m a
 mergeSources = mergeResumable . map newResumableSource
   where