diff --git a/src/sss/encode.rs b/src/sss/encode.rs
index dfb8302..abfe549 100644
--- a/src/sss/encode.rs
+++ b/src/sss/encode.rs
@@ -2,7 +2,8 @@ use gf256::Gf256;
 use std::io;
 use std::io::prelude::*;
 
-/// evaluates a polynomial at x=1, 2, 3, ... n (inclusive)
+/// Evaluates a polynomial at x=1, 2, 3, ... n (inclusive) using
+/// Horner's method.
 pub(crate) fn encode_secret_byte<W: Write>(src: &[u8], n: u8, w: &mut W) -> io::Result<()> {
     for raw_x in 1..(u16::from(n) + 1) {
         let x = Gf256::from_byte(raw_x as u8);