diff --git a/app/javascript/mastodon/components/autosuggest_textarea.js b/app/javascript/mastodon/components/autosuggest_textarea.js
index daeb6fd53..6f725885d 100644
--- a/app/javascript/mastodon/components/autosuggest_textarea.js
+++ b/app/javascript/mastodon/components/autosuggest_textarea.js
@@ -20,7 +20,7 @@ const textAtCursorMatchesToken = (str, caretPosition) => {
     word = str.slice(left, right + caretPosition);
   }
 
-  if (!word || word.trim().length < 2 || ['@', ':'].indexOf(word[0]) === -1) {
+  if (!word || word.trim().length < 3 || ['@', ':'].indexOf(word[0]) === -1) {
     return [null, null];
   }