diff --git a/y2015/src/days/d13.rs b/y2015/src/days/d13.rs
index adb2b7f..96d45f8 100644
--- a/y2015/src/days/d13.rs
+++ b/y2015/src/days/d13.rs
@@ -71,11 +71,11 @@ fn permutation(mut people: Vec<String>, nth: usize) -> Result<Vec<String>, Box<d
         return Err(Box::from("Out of bounds"));
     }
     let mut perm = Vec::new();
-    let num_unique_locations = people.len();
+    let num_unique_people = people.len();
     let mut remainder = nth - 1;
     for idx in 1..=people.len() {
-        let permutations = remainder / factorial(num_unique_locations - idx);
-        remainder %= factorial(num_unique_locations - idx);
+        let permutations = remainder / factorial(num_unique_people - idx);
+        remainder %= factorial(num_unique_people - idx);
         perm.push(people[permutations].clone());
         people.remove(permutations);
     }