diff --git a/src/plugins/sib-reactions.js b/src/plugins/sib-reactions.js
index 7578018c07714623494524f7567e95f88fbdcffb..230295f43c02f4eec4feb73c3fa6d26604f1b7d4 100644
--- a/src/plugins/sib-reactions.js
+++ b/src/plugins/sib-reactions.js
@@ -169,7 +169,7 @@ converse.plugins.add('sib-reactions', {
           for (let e of r.emojis) {
             if (emojis.hasOwnProperty(e)) {
               emojis[e].count += 1;
-              emojis[e].from_user = emojis[e].from_user ?? r.from_real_jid === from_real_jid;
+              emojis[e].from_user = emojis[e].from_user || r.from_real_jid === from_real_jid;
             } else {
               emojis[e] = {
                 emoji: e,