diff --git a/Crypto/Number/ModArithmetic.hs b/Crypto/Number/ModArithmetic.hs
index 7250555..ef59d7e 100644
--- a/Crypto/Number/ModArithmetic.hs
+++ b/Crypto/Number/ModArithmetic.hs
@@ -97,7 +97,7 @@ inverseCoprimes g m =
         Just i  -> i
 
 -- | Computes the Jacobi symbol (a/n).
--- 0 = a < n; n = 3 and odd.
+-- 0 ≤ a < n; n ≥ 3 and odd.
 --  
 -- The Legendre and Jacobi symbols are indistinguishable exactly when the
 -- lower argument is an odd prime, in which case they have the same value.
@@ -120,4 +120,4 @@ jacobi a n
           s       = if nMod4 == 3 && a1Mod4 == 3 then -s' else s'
           n1      = n `mod` a1
        in if a1 == 1 then Just s
-          else fmap (*s) (jacobi n1 a1)
\ No newline at end of file
+          else fmap (*s) (jacobi n1 a1)