diff --git a/cmake/ECM/modules/ECMFindModuleHelpers.cmake b/cmake/ECM/modules/ECMFindModuleHelpers.cmake
index a4837403d..92c796e6b 100644
--- a/cmake/ECM/modules/ECMFindModuleHelpers.cmake
+++ b/cmake/ECM/modules/ECMFindModuleHelpers.cmake
@@ -103,8 +103,6 @@ The following variables will be set:
 Since pre-1.0.0.
 #]=======================================================================]
 
-include(CMakeParseArguments)
-
 macro(ecm_find_package_version_check module_name)
     if(CMAKE_VERSION VERSION_LESS 3.16.0)
         message(FATAL_ERROR "CMake 3.16.0 is required by Find${module_name}.cmake")
diff --git a/cmake/ECM/modules/QtVersionOption.cmake b/cmake/ECM/modules/QtVersionOption.cmake
index ea37da22d..0ea036585 100644
--- a/cmake/ECM/modules/QtVersionOption.cmake
+++ b/cmake/ECM/modules/QtVersionOption.cmake
@@ -12,6 +12,9 @@ that is, if the major Qt version has not yet been determined otherwise
 This module is typically included by other modules requiring knowledge
 about the major Qt version.
 
+If the ECM version passed to find_package was at least 5.240.0 Qt6 is picked by default.
+Otherwise Qt5 is picked.
+
 ``QT_MAJOR_VERSION`` is defined to either be "5" or "6".
 
 Since 5.82.0.
@@ -26,7 +29,11 @@ if (TARGET Qt5::Core)
 elseif (TARGET Qt6::Core)
     set(QT_MAJOR_VERSION 6)
 else()
-    option(BUILD_WITH_QT6 "Build against Qt 6" OFF)
+    if (ECM_GLOBAL_FIND_VERSION VERSION_GREATER_EQUAL 5.240)
+        option(BUILD_WITH_QT6 "Build against Qt 6" ON)
+    else()
+        option(BUILD_WITH_QT6 "Build against Qt 6" OFF)
+    endif()
 
     if (BUILD_WITH_QT6)
         set(QT_MAJOR_VERSION 6)
diff --git a/cmake/KDAB/modules/KDQtInstallPaths.cmake b/cmake/KDAB/modules/KDQtInstallPaths.cmake
index d37888445..c9294c011 100644
--- a/cmake/KDAB/modules/KDQtInstallPaths.cmake
+++ b/cmake/KDAB/modules/KDQtInstallPaths.cmake
@@ -1,5 +1,5 @@
 #
-# SPDX-FileCopyrightText: 2016-2023 Klarälvdalens Datakonsult AB, a KDAB Group company <info@kdab.com>
+# SPDX-FileCopyrightText: 2016 Klarälvdalens Datakonsult AB, a KDAB Group company <info@kdab.com>
 # Author: Allen Winter <allen.winter@kdab.com>
 #
 # SPDX-License-Identifier: BSD-3-Clause
diff --git a/ui/clienttoolmodel.cpp b/ui/clienttoolmodel.cpp
index 2f4d153bd..ea6233999 100644
--- a/ui/clienttoolmodel.cpp
+++ b/ui/clienttoolmodel.cpp
@@ -89,7 +89,7 @@ Qt::ItemFlags ClientToolModel::flags(const QModelIndex &index) const
     if (!index.isValid())
         return flags;
 
-    const auto &tool = m_toolManager->tools().at(index.row());
+    const auto tool = m_toolManager->tools().at(index.row());
     if (!tool.isEnabled() || (!tool.remotingSupported() && Endpoint::instance()->isRemoteClient()))
         flags &= ~(Qt::ItemIsEnabled | Qt::ItemIsSelectable);
     return flags;
diff --git a/ui/uistatemanager.cpp b/ui/uistatemanager.cpp
index 8d40ff774..964ac18ac 100644
--- a/ui/uistatemanager.cpp
+++ b/ui/uistatemanager.cpp
@@ -559,7 +559,7 @@ void UIStateManager::headerSectionCountChanged()
     // E.g. we might be here because of columnsInserted() (which just finished, but not all receivers were told yet)
     // and restoring will sort() the model, which will emit layoutChanged(). Separate the two so QAbstractItemModelTester doesn't abort.
     // clang-format off
-    QMetaObject::invokeMethod(this, "restoreHeaderState", Qt::QueuedConnection, Q_ARG(QHeaderView*, headerView));
+    QMetaObject::invokeMethod(this, "restoreHeaderState", Qt::QueuedConnection, Q_ARG(QHeaderView *, headerView));
     // clang-format on
 }