diff --git a/src/client/QXmppMixManager.cpp b/src/client/QXmppMixManager.cpp
index 31be50e14..0a94d1927 100644
--- a/src/client/QXmppMixManager.cpp
+++ b/src/client/QXmppMixManager.cpp
@@ -373,10 +373,10 @@ QXmppTask<QXmppMixManager::ChannelNodeResult> QXmppMixManager::requestChannelNod
             return std::move(*error);
         } else {
             const auto &items = std::get<QList<QXmppDiscoveryIq::Item>>(result);
-            QVector<QString> nodes;
+            QVector<QString> nodes(items.size());
 
-            std::for_each(items.cbegin(), items.cend(), [&nodes](const QXmppDiscoveryIq::Item &item) {
-                nodes.append(item.node());
+            std::transform(items.cbegin(), items.cend(), nodes.begin(), [](const QXmppDiscoveryIq::Item &item) {
+                return item.node();
             });
 
             return std::move(QXmppMixIq::listToNodes(nodes));