diff --git a/cmake/define_definitions.cmake b/cmake/define_definitions.cmake
index 94550bbde..75b65ae38 100644
--- a/cmake/define_definitions.cmake
+++ b/cmake/define_definitions.cmake
@@ -65,7 +65,7 @@ message("GIT_COMMIT_SHA            :" ${GIT_COMMIT_SHA})
 if(BUILD_WITH_KF6)
   message("KF6_GIT_TAG               :" ${KF6_GIT_TAG})
 else()
-  add_definitions(-DBUILD_WITHOUT_KF5)
+  add_definitions(-DBUILD_WITHOUT_KF6)
 endif()
 message("QET_COMPONENTS            :" ${QET_COMPONENTS})
 message("QT_VERSION_MAJOR          :" ${QT_VERSION_MAJOR})
diff --git a/sources/editor/ui/dynamictextfieldeditor.cpp b/sources/editor/ui/dynamictextfieldeditor.cpp
index b21c2039d..afb841bb9 100644
--- a/sources/editor/ui/dynamictextfieldeditor.cpp
+++ b/sources/editor/ui/dynamictextfieldeditor.cpp
@@ -140,7 +140,7 @@ void DynamicTextFieldEditor::updateForm()
 		ui -> m_user_text_le -> setText(m_text_field.data() -> text());
 		ui -> m_size_sb -> setValue(m_text_field.data() -> font().pointSize());
 		ui->m_keep_visual_rotation_cb->setChecked(m_text_field.data()->keepVisualRotation());
-#ifdef BUILD_WITHOUT_KF5
+#ifdef BUILD_WITHOUT_KF6
 #else
 		m_color_kpb -> setColor(m_text_field.data() -> color());
 #endif
@@ -169,7 +169,7 @@ void DynamicTextFieldEditor::updateForm()
 
 void DynamicTextFieldEditor::setupWidget()
 {
-#ifdef BUILD_WITHOUT_KF5
+#ifdef BUILD_WITHOUT_KF6
 #else
 	m_color_kpb = new KColorButton(this);
 	m_color_kpb->setObjectName(QString::fromUtf8("m_color_kpb"));
diff --git a/sources/editor/ui/dynamictextfieldeditor.h b/sources/editor/ui/dynamictextfieldeditor.h
index d419f9c72..29644c4ae 100644
--- a/sources/editor/ui/dynamictextfieldeditor.h
+++ b/sources/editor/ui/dynamictextfieldeditor.h
@@ -21,7 +21,7 @@
 #include "../elementitemeditor.h"
 #include "../graphicspart/partdynamictextfield.h"
 
-#ifdef BUILD_WITHOUT_KF5
+#ifdef BUILD_WITHOUT_KF6
 #else
 #	include <KColorButton>
 #endif
@@ -77,7 +77,7 @@ class DynamicTextFieldEditor : public ElementItemEditor {
 		QList<PartDynamicTextField*> m_parts;
 		QList<QMetaObject::Connection> m_connection_list;
 
-	#ifdef BUILD_WITHOUT_KF5
+	#ifdef BUILD_WITHOUT_KF6
 	#else
 		KColorButton* m_color_kpb = nullptr;
 	#endif
diff --git a/sources/editor/ui/texteditor.cpp b/sources/editor/ui/texteditor.cpp
index b088e6571..4dea81414 100644
--- a/sources/editor/ui/texteditor.cpp
+++ b/sources/editor/ui/texteditor.cpp
@@ -62,7 +62,7 @@ void TextEditor::updateForm()
 	m_rotation_sb -> setValue(m_text -> rotation());
 	m_size_sb -> setValue(m_text -> font().pointSize());
 	m_font_pb -> setText(m_text -> font().family());
-#ifdef BUILD_WITHOUT_KF5
+#ifdef BUILD_WITHOUT_KF6
 #else
 	m_color_pb -> setColor(m_text -> defaultTextColor());
 #endif
@@ -344,7 +344,7 @@ void TextEditor::setUpWidget(QWidget *parent)
 	m_line_edit->setPlaceholderText(tr("Entrer votre texte ici"));
 
 	gridLayout->addWidget(m_line_edit, 0, 0, 1, 6);
-#ifdef BUILD_WITHOUT_KF5
+#ifdef BUILD_WITHOUT_KF6
 #else
 	m_color_pb = new KColorButton(parent);
 	m_color_pb->setObjectName(QString::fromUtf8("m_color_pb"));
diff --git a/sources/editor/ui/texteditor.h b/sources/editor/ui/texteditor.h
index 97d85d4d5..de6bc8b74 100644
--- a/sources/editor/ui/texteditor.h
+++ b/sources/editor/ui/texteditor.h
@@ -25,7 +25,7 @@
 #include <QSpinBox>
 #include <QLineEdit>
 #include <QPushButton>
-#ifdef BUILD_WITHOUT_KF5
+#ifdef BUILD_WITHOUT_KF6
 #else
 #include <KColorButton>
 #endif
@@ -65,7 +65,7 @@ class TextEditor : public ElementItemEditor {
 		QSpinBox *m_size_sb;
 		QLineEdit *m_line_edit;
 		QPushButton *m_font_pb;
-#ifdef BUILD_WITHOUT_KF5
+#ifdef BUILD_WITHOUT_KF6
 #else
 		KColorButton *m_color_pb;
 #endif
diff --git a/sources/qetapp.cpp b/sources/qetapp.cpp
index 8967347ae..727dbdc89 100644
--- a/sources/qetapp.cpp
+++ b/sources/qetapp.cpp
@@ -45,7 +45,7 @@
 #define STRINGIFY(x) #x
 #include <QProcessEnvironment>
 #include <QRegularExpression>
-#ifdef BUILD_WITHOUT_KF5
+#ifdef BUILD_WITHOUT_KF6
 #else
 #	include <KAutoSaveFile>
 #endif
@@ -2368,7 +2368,7 @@ void QETApp::buildSystemTrayMenu()
 */
 void QETApp::checkBackupFiles()
 {
-#ifdef BUILD_WITHOUT_KF5
+#ifdef BUILD_WITHOUT_KF6
 	return;
 #else
 	QList<KAutoSaveFile *> stale_files = KAutoSaveFile::allStaleFiles();
diff --git a/sources/qetdiagrameditor.cpp b/sources/qetdiagrameditor.cpp
index e50b158e4..96ca61871 100644
--- a/sources/qetdiagrameditor.cpp
+++ b/sources/qetdiagrameditor.cpp
@@ -46,7 +46,7 @@
 #include "ui/diagrameditorhandlersizewidget.h"
 #include "TerminalStrip/ui/addterminalstripitemdialog.h"
 
-#ifdef BUILD_WITHOUT_KF5
+#ifdef BUILD_WITHOUT_KF6
 #else
 #	include <KAutoSaveFile>
 #endif
@@ -1892,7 +1892,7 @@ bool QETDiagramEditor::drawGrid() const
 	return m_draw_grid->isChecked();
 }
 
-#ifdef BUILD_WITHOUT_KF5
+#ifdef BUILD_WITHOUT_KF6
 #else
 /**
 	@brief QETDiagramEditor::openBackupFiles
diff --git a/sources/qetdiagrameditor.h b/sources/qetdiagrameditor.h
index 382605fa6..db528ca31 100644
--- a/sources/qetdiagrameditor.h
+++ b/sources/qetdiagrameditor.h
@@ -43,7 +43,7 @@ class DiagramPropertiesEditorDockWidget;
 class ElementsCollectionWidget;
 class AutoNumberingDockWidget;
 
-#ifdef BUILD_WITHOUT_KF5
+#ifdef BUILD_WITHOUT_KF6
 #else
 class KAutoSaveFile;
 #endif
@@ -69,7 +69,7 @@ class QETDiagramEditor : public QETMainWindow
 		ProjectView *currentProjectView() const;
 		QETProject *currentProject() const;
 		bool drawGrid() const;
-#ifdef BUILD_WITHOUT_KF5
+#ifdef BUILD_WITHOUT_KF6
 #else
 		void openBackupFiles (QList<KAutoSaveFile *> backup_files);
 #endif
diff --git a/sources/qetproject.cpp b/sources/qetproject.cpp
index 4d60aba14..63f51acc4 100644
--- a/sources/qetproject.cpp
+++ b/sources/qetproject.cpp
@@ -86,7 +86,7 @@ QETProject::QETProject(const QString &path, QObject *parent) :
 	init();
 }
 
-#ifdef BUILD_WITHOUT_KF5
+#ifdef BUILD_WITHOUT_KF6
 #else
 /**
 	@brief QETProject::QETProject
@@ -330,7 +330,7 @@ void QETProject::setFilePath(const QString &filepath)
 	if (filepath == m_file_path) {
 		return;
 	}
-#ifdef BUILD_WITHOUT_KF5
+#ifdef BUILD_WITHOUT_KF6
 #else
 	if (m_backup_file.isOpen()) {
 		m_backup_file.close();
@@ -1911,7 +1911,7 @@ NamesList QETProject::namesListForIntegrationCategory()
 */
 void QETProject::writeBackup()
 {
-#ifdef BUILD_WITHOUT_KF5
+#ifdef BUILD_WITHOUT_KF6
 #else
 #	if QT_VERSION < QT_VERSION_CHECK(6, 0, 0) // ### Qt 6: remove
 	QDomDocument xml_project(toXml());
diff --git a/sources/qetproject.h b/sources/qetproject.h
index 696a28a44..b508a1c9b 100644
--- a/sources/qetproject.h
+++ b/sources/qetproject.h
@@ -29,7 +29,7 @@
 #include "titleblock/templatescollection.h"
 #include "titleblockproperties.h"
 
-#ifdef BUILD_WITHOUT_KF5
+#ifdef BUILD_WITHOUT_KF6
 #else
 #	include <KAutoSaveFile>
 #endif
@@ -47,7 +47,7 @@ class XmlElementCollection;
 class QTimer;
 class TerminalStrip;
 
-#ifdef BUILD_WITHOUT_KF5
+#ifdef BUILD_WITHOUT_KF6
 #else
 class KAutoSaveFile;
 #endif
@@ -78,7 +78,7 @@ class QETProject : public QObject
 	public:
 		QETProject (QObject *parent = nullptr);
 		QETProject (const QString &path, QObject * = nullptr);
-#ifdef BUILD_WITHOUT_KF5
+#ifdef BUILD_WITHOUT_KF6
 #else
 		QETProject (KAutoSaveFile *backup, QObject *parent=nullptr);
 #endif
@@ -288,7 +288,7 @@ class QETProject : public QObject
 		bool m_freeze_new_conductors = false;
 		QTimer m_save_backup_timer,
 			   m_autosave_timer;
-#ifdef BUILD_WITHOUT_KF5
+#ifdef BUILD_WITHOUT_KF6
 #else
 		KAutoSaveFile m_backup_file;
 #endif