diff --git a/app/javascript/mastodon/actions/compose.js b/app/javascript/mastodon/actions/compose.js
index 74841334a07..6324b8ce417 100644
--- a/app/javascript/mastodon/actions/compose.js
+++ b/app/javascript/mastodon/actions/compose.js
@@ -726,7 +726,7 @@ function insertIntoTagHistory(recognizedTags, text) {
     // complicated because of new normalization rules, it's no longer just
     // a case sensitivity issue
     const names = recognizedTags.map(tag => {
-      const matches = text.match(new RegExp(`[#|＃]${tag.name}`, 'i'));
+      const matches = text.match(new RegExp(`[#＃]${tag.name}`, 'i'));
 
       if (matches && matches.length > 0) {
         return matches[0].slice(1);