diff --git a/app/javascript/flavours/glitch/reducers/compose.js b/app/javascript/flavours/glitch/reducers/compose.js
index f758d5c93..e033dead3 100644
--- a/app/javascript/flavours/glitch/reducers/compose.js
+++ b/app/javascript/flavours/glitch/reducers/compose.js
@@ -295,7 +295,7 @@ const expiresInFromExpiresAt = expires_at => {
 const mergeLocalHashtagResults = (suggestions, prefix, tagHistory) => {
   prefix = prefix.toLowerCase();
   if (suggestions.length < 4) {
-    const localTags = tagHistory.filter(tag => tag.toLowerCase().startsWith(prefix) && !suggestions.some(suggestion => suggestion.type === 'hashtag' && suggestion.name.toLowerCase() === tag.toLowerCase()));
+    const localTags = tagHistory.filter(tag => tag && tag.toLowerCase().startsWith(prefix) && !suggestions.some(suggestion => suggestion.type === 'hashtag' && suggestion.name.toLowerCase() === tag.toLowerCase()));
     return suggestions.concat(localTags.slice(0, 4 - suggestions.length).toJS().map(tag => ({ type: 'hashtag', name: tag })));
   } else {
     return suggestions;