diff --git a/app/components/autocomplete/at_mention/at_mention.js b/app/components/autocomplete/at_mention/at_mention.js
index 016211414..9f35032fa 100644
--- a/app/components/autocomplete/at_mention/at_mention.js
+++ b/app/components/autocomplete/at_mention/at_mention.js
@@ -62,6 +62,7 @@ export default class AtMention extends PureComponent {
 
         // Not invoked, render nothing.
         if (matchTerm === null) {
+            this.props.onResultCountChange(0);
             this.setState({
                 mentionComplete: false,
                 sections: [],