diff --git a/Text/Blaze/Renderer/Utf8.hs b/Text/Blaze/Renderer/Utf8.hs
index 9c65286..812e488 100644
--- a/Text/Blaze/Renderer/Utf8.hs
+++ b/Text/Blaze/Renderer/Utf8.hs
@@ -20,7 +20,7 @@ import qualified Text.Blaze.Builder.Html as B
 --
 fromChoiceString :: ChoiceString  -- ^ String to render
                  -> Builder       -- ^ Resulting builder
-fromChoiceString (Static s)     = B.fromByteString $ getUtf8ByteString s
+fromChoiceString (Static s)     = B.copyByteString $ getUtf8ByteString s
 fromChoiceString (String s)     = B.fromHtmlEscapedString s
 fromChoiceString (Text s)       = B.fromHtmlEscapedText s
 fromChoiceString (ByteString s) = B.fromByteString s
@@ -47,17 +47,17 @@ renderBuilder = go mempty
   where
     go :: Builder -> HtmlM b -> Builder
     go attrs (Parent open close content) =
-        B.fromByteString (getUtf8ByteString open)
+        B.copyByteString (getUtf8ByteString open)
             `mappend` attrs
             `mappend` B.fromChar '>'
             `mappend` go mempty content
-            `mappend` B.fromByteString (getUtf8ByteString close)
+            `mappend` B.copyByteString (getUtf8ByteString close)
     go attrs (Leaf begin end) = 
-        B.fromByteString (getUtf8ByteString begin)
+        B.copyByteString (getUtf8ByteString begin)
             `mappend` attrs
-            `mappend` B.fromByteString (getUtf8ByteString end)
+            `mappend` B.copyByteString (getUtf8ByteString end)
     go attrs (AddAttribute key value h) =
-        go (B.fromByteString (getUtf8ByteString key)
+        go (B.copyByteString (getUtf8ByteString key)
             `mappend` fromChoiceString value
             `mappend` B.fromChar '"'
             `mappend` attrs) h