Add missing Data.Monoid import

diff --git a/src/Crypto/Macaroon/Verifier.hs b/src/Crypto/Macaroon/Verifier.hs
index 02cb448db340d2557b72b0486c8303bcd8987734..ed24ea4b99744efd882975614f730c474767e88c 100644 (file)
--- a/src/Crypto/Macaroon/Verifier.hs
+++ b/src/Crypto/Macaroon/Verifier.hs
@@ -32,6 +32,7 @@ import           Data.Byteable
 import           Data.Foldable
 import           Data.Function
 import           Data.Maybe
+import           Data.Monoid
 import           Data.Traversable
 import Data.Attoparsec.ByteString
 import Data.Attoparsec.ByteString.Char8