diff --git a/src/snek/static/chat-input.js b/src/snek/static/chat-input.js
index 8293097..aa534cc 100644
--- a/src/snek/static/chat-input.js
+++ b/src/snek/static/chat-input.js
@@ -261,7 +261,7 @@ levenshteinDistance(a, b) {
     const millisecondsDifference = event2Time.getTime() - event1Time.getTime();
     return millisecondsDifference / 1000;
   }
-  isSubsequence(input, array) {
+  isSubsequence(s, t) {
       let i = 0, j = 0;
       while (i < s.length && j < t.length) {
         if (s[i] === t[j]) {