diff --git a/Crypto/Number/Generate.hs b/Crypto/Number/Generate.hs
--- a/Crypto/Number/Generate.hs
+++ b/Crypto/Number/Generate.hs
@@ -16,8 +16,10 @@
 import qualified Data.ByteString as B
 import Data.Bits ((.|.))
 
--- | generate a positive integer between 0 and m.
--- using as many bytes as necessary to the same size as m, that are converted to integer.
+-- | generate a positive integer x, s.t. 0 <= x < m
+--
+-- Note that depending on m value, the number distribution
+-- generated by this function is not necessarily uniform.
 generateMax :: CPRG g => g -> Integer -> (Integer, g)
 generateMax rng m = withRandomBytes rng (lengthBytes m) $ \bs ->
     os2ip bs `mod` m
diff --git a/Tests/Tests.hs b/Tests/Tests.hs
--- a/Tests/Tests.hs
+++ b/Tests/Tests.hs
@@ -12,6 +12,7 @@
 import Control.Applicative ((<$>))
 
 import qualified Data.ByteString as B
+import Data.ByteString.Char8 () -- orphan IsString instance
 
 import Crypto.Number.ModArithmetic
 import Crypto.Number.Basic
diff --git a/crypto-numbers.cabal b/crypto-numbers.cabal
--- a/crypto-numbers.cabal
+++ b/crypto-numbers.cabal
@@ -1,5 +1,5 @@
 Name:                crypto-numbers
-Version:             0.1.2
+Version:             0.1.3
 Description:         Cryptographic numbers: functions and algorithms
 License:             BSD3
 License-file:        LICENSE