diff --git a/src/ui/form/opt/pages/optionspage.cpp b/src/ui/form/opt/pages/optionspage.cpp
index 84b4c631..acda4886 100644
--- a/src/ui/form/opt/pages/optionspage.cpp
+++ b/src/ui/form/opt/pages/optionspage.cpp
@@ -774,7 +774,9 @@ QLayout *OptionsPage::setupEditShortcutLayout()
     m_labelShortcut = ControlUtil::createLabel();
 
     m_editShortcut = new QKeySequenceEdit();
+#if QT_VERSION >= QT_VERSION_CHECK(6, 6, 0)
     m_editShortcut->setClearButtonEnabled(true);
+#endif
     m_editShortcut->setFixedWidth(200);
 
     const auto onEditShortcut = [&](const QKeySequence &shortcut) {
diff --git a/src/ui/manager/envmanager.cpp b/src/ui/manager/envmanager.cpp
index c56523e5..0918409e 100644
--- a/src/ui/manager/envmanager.cpp
+++ b/src/ui/manager/envmanager.cpp
@@ -38,8 +38,8 @@ bool EnvManager::checkEnvironmentChanged() const
 #else
     auto it = m_cache.constBegin();
     for (; it != m_cache.constEnd(); ++it) {
-        const auto key = it.key();
-        const auto value = it.value();
+        const auto &key = it.key();
+        const auto &value = it.value();
 #endif
 
         const auto newValue = readEnvVar(key);
diff --git a/src/ui/util/conf/confutil.cpp b/src/ui/util/conf/confutil.cpp
index 5e6128a3..0d123f76 100644
--- a/src/ui/util/conf/confutil.cpp
+++ b/src/ui/util/conf/confutil.cpp
@@ -796,7 +796,14 @@ void ConfUtil::writeApps(char **data, const appdata_map_t &appsMap, bool useHead
         *offp++ = 0;
     }
 
+#if QT_VERSION >= QT_VERSION_CHECK(6, 6, 0)
     for (const auto &[kernelPath, appData] : appsMap.asKeyValueRange()) {
+#else
+    auto it = appsMap.constBegin();
+    for (; it != appsMap.constEnd(); ++it) {
+        const auto &kernelPath = it.key();
+        const auto &appData = it.value();
+#endif
         const int kernelPathSize = kernelPath.size();
 
         const quint16 appPathLen = quint16(kernelPathSize * sizeof(wchar_t));