diff --git a/Data/Text/Lazy/Encoding.hs b/Data/Text/Lazy/Encoding.hs
--- a/Data/Text/Lazy/Encoding.hs
+++ b/Data/Text/Lazy/Encoding.hs
@@ -62,7 +62,7 @@
 import qualified Data.ByteString.Unsafe as B
 #if MIN_VERSION_bytestring(0,10,4)
 import Data.Word (Word8)
-import Data.Monoid (mempty, (<>))
+import Data.Monoid (mempty, mappend)
 import qualified Data.ByteString.Builder as B
 import qualified Data.ByteString.Builder.Extra as B (safeStrategy, toLazyByteStringWith)
 import qualified Data.ByteString.Builder.Prim as BP
@@ -163,12 +163,12 @@
     strategy        = B.safeStrategy firstChunkSize B.defaultChunkSize
 
 encodeUtf8Builder :: Text -> B.Builder
-encodeUtf8Builder = foldrChunks (\c b -> TE.encodeUtf8Builder c <> b) mempty
+encodeUtf8Builder = foldrChunks (\c b -> TE.encodeUtf8Builder c `mappend` b) mempty
 
 {-# INLINE encodeUtf8BuilderEscaped #-}
 encodeUtf8BuilderEscaped :: BP.BoundedPrim Word8 -> Text -> B.Builder
 encodeUtf8BuilderEscaped prim =
-    foldrChunks (\c b -> TE.encodeUtf8BuilderEscaped prim c <> b) mempty
+    foldrChunks (\c b -> TE.encodeUtf8BuilderEscaped prim c `mappend` b) mempty
 
 #else
 encodeUtf8 (Chunk c cs) = B.Chunk (TE.encodeUtf8 c) (encodeUtf8 cs)
diff --git a/text.cabal b/text.cabal
--- a/text.cabal
+++ b/text.cabal
@@ -1,5 +1,5 @@
 name:           text
-version:        1.1.1.3
+version:        1.1.1.4
 homepage:       https://github.com/bos/text
 bug-reports:    https://github.com/bos/text/issues
 synopsis:       An efficient packed Unicode text type.
@@ -136,7 +136,6 @@
   ghc-options: -Wall -fwarn-tabs -funbox-strict-fields -O2
   if flag(developer)
     ghc-prof-options: -auto-all
-    ghc-options: -Werror
     cpp-options: -DASSERTS
 
   if flag(integer-simple)