diff --git a/60_Mastermind/README.md b/60_Mastermind/README.md
index 2e74ed1c..7820eed7 100644
--- a/60_Mastermind/README.md
+++ b/60_Mastermind/README.md
@@ -28,7 +28,7 @@ As published in Basic Computer Games (1978):
 Downloaded from Vintage Basic at
 http://www.vintage-basic.net/games.html
 
-###How the computer deduces your guess.
+### How the computer deduces your guess.
 
 The computer takes the number of black pegs and white pegs that the user reports
 and uses that information as a target. It then assumes its guess is the answer
diff --git a/60_Mastermind/rust/src/main.rs b/60_Mastermind/rust/src/main.rs
index afe1802d..2c31f4c0 100644
--- a/60_Mastermind/rust/src/main.rs
+++ b/60_Mastermind/rust/src/main.rs
@@ -324,7 +324,7 @@ fn main() {
                 all_possibilities.iter_mut().enumerate().for_each(|b| {
                     if *b.1 { //filter out ones we already know aren't possible
                         let mut tmp_guess = GUESS::new(CODE::new_from_int(b.0, num_colors, num_positions));
-                        tmp_guess.evaluate(&answer);
+                        tmp_guess.evaluate(&guess.code); //compare with computer guess
                         if blacks != tmp_guess.blacks || whites != tmp_guess.whites { //if number of blacks/whites is different, set it to false
                             *b.1 = false;
                         }