diff --git a/proxy.py b/proxy.py
index 5ce4679..5f0a776 100644
--- a/proxy.py
+++ b/proxy.py
@@ -143,7 +143,8 @@ class DynamicResolver(object):
                 order.append(kv[0])
                 i += length
             
-            data = [b"%s=%s" % (p, info.properties[p]) for p in sorted(info.properties, key=lambda k: order.index(k) if k in order else 1000)]
+            data = [(b"%s=%s" % (p, v)) if (v := info.properties[p]) is not None else p
+                    for p in sorted(info.properties, key=lambda k: order.index(k) if k in order else 1000)]
             now = current_time_millis()
             cached = self.zeroconf.cache.get_by_details(localname, _TYPE_TXT, _CLASS_IN)
             record_ttl = int(cached.get_remaining_ttl(now)) if cached else ttl