diff --git a/src/prob3/mod.rs b/src/prob3/mod.rs
index 0d9d249..fac3a0e 100644
--- a/src/prob3/mod.rs
+++ b/src/prob3/mod.rs
@@ -39,7 +39,7 @@ pub fn solve_part2(file_path: &str) -> i32 {
         .step_by(3)
         .collect::<Vec<&str>>()
         .iter()
-        .map(|item| {
+        .map(|_item| {
             let common_letter = {
                 let first = &iter
                     .next()