diff --git a/autotests/addremoveannotationtest.cpp b/autotests/addremoveannotationtest.cpp
index 687eaa4de..5d97da123 100644
--- a/autotests/addremoveannotationtest.cpp
+++ b/autotests/addremoveannotationtest.cpp
@@ -17,7 +17,7 @@ class AddRemoveAnnotationTest : public QObject
 {
     Q_OBJECT
 
-private slots:
+private Q_SLOTS:
     void initTestCase();
     void init();
     void cleanup();
diff --git a/autotests/annotationstest.cpp b/autotests/annotationstest.cpp
index 43b3b2ebf..c8c75cf8f 100644
--- a/autotests/annotationstest.cpp
+++ b/autotests/annotationstest.cpp
@@ -19,7 +19,7 @@ class AnnotationTest : public QObject
 {
     Q_OBJECT
 
-private slots:
+private Q_SLOTS:
     void initTestCase();
     void testDistance();
     void testDistance_data();
diff --git a/autotests/annotationtoolbartest.cpp b/autotests/annotationtoolbartest.cpp
index 75f548a00..d57499daa 100644
--- a/autotests/annotationtoolbartest.cpp
+++ b/autotests/annotationtoolbartest.cpp
@@ -54,7 +54,7 @@ public:
         return s->m_tabWidget;
     }
 
-private slots:
+private Q_SLOTS:
     void initTestCase();
     void init();
     void cleanup();
diff --git a/autotests/calculatetexttest.cpp b/autotests/calculatetexttest.cpp
index dfff3b607..1b87df2af 100644
--- a/autotests/calculatetexttest.cpp
+++ b/autotests/calculatetexttest.cpp
@@ -18,7 +18,7 @@ class CalculateTextTest : public QObject
 {
     Q_OBJECT
 
-private slots:
+private Q_SLOTS:
     void initTestCase();
     void cleanupTestCase();
 
diff --git a/autotests/closedialoghelper.h b/autotests/closedialoghelper.h
index b5b5fc689..8fa5b6a3a 100644
--- a/autotests/closedialoghelper.h
+++ b/autotests/closedialoghelper.h
@@ -25,7 +25,7 @@ public:
 
     ~CloseDialogHelper() override;
 
-private slots:
+private Q_SLOTS:
     void closeDialog();
 
 private:
diff --git a/autotests/documenttest.cpp b/autotests/documenttest.cpp
index eaedb5c50..db19ca60b 100644
--- a/autotests/documenttest.cpp
+++ b/autotests/documenttest.cpp
@@ -26,7 +26,7 @@ class DocumentTest : public QObject
 {
     Q_OBJECT
 
-private slots:
+private Q_SLOTS:
     void testCloseDuringRotationJob();
     void testDocdataMigration();
 };
diff --git a/autotests/editannotationcontentstest.cpp b/autotests/editannotationcontentstest.cpp
index 6e81323a0..9949273fc 100644
--- a/autotests/editannotationcontentstest.cpp
+++ b/autotests/editannotationcontentstest.cpp
@@ -18,7 +18,7 @@ class EditAnnotationContentsTest : public QObject
 {
     Q_OBJECT
 
-private slots:
+private Q_SLOTS:
     void initTestCase();
     void cleanupTestCase();
     void init();
@@ -65,7 +65,7 @@ public:
         return m_anchorPos;
     }
 
-private slots:
+private Q_SLOTS:
     void slotAnnotationContentsChangedByUndoRedo(Okular::Annotation *annotation, const QString &contents, int cursorPos, int anchorPos);
 
 private:
diff --git a/autotests/editformstest.cpp b/autotests/editformstest.cpp
index c28dd5777..984325b36 100644
--- a/autotests/editformstest.cpp
+++ b/autotests/editformstest.cpp
@@ -17,7 +17,7 @@ class EditFormsTest : public QObject
 {
     Q_OBJECT
 
-private slots:
+private Q_SLOTS:
     void initTestCase();
     void cleanupTestCase();
     void init();
diff --git a/autotests/formattest.cpp b/autotests/formattest.cpp
index 7a83d0f34..b1ab3f220 100644
--- a/autotests/formattest.cpp
+++ b/autotests/formattest.cpp
@@ -21,7 +21,7 @@ class FormatTest : public QObject
 {
     Q_OBJECT
 
-private slots:
+private Q_SLOTS:
     void initTestCase();
     void cleanupTestCase();
     void testTimeFormat();
diff --git a/autotests/generatorstest.cpp b/autotests/generatorstest.cpp
index 89610fb2f..1d9c701b5 100644
--- a/autotests/generatorstest.cpp
+++ b/autotests/generatorstest.cpp
@@ -16,7 +16,7 @@
 class GeneratorsTest : public QObject
 {
     Q_OBJECT
-private slots:
+private Q_SLOTS:
     void testLoadsCorrectly();
 };
 
diff --git a/autotests/keystroketest.cpp b/autotests/keystroketest.cpp
index 9277b96e2..03de3df5e 100644
--- a/autotests/keystroketest.cpp
+++ b/autotests/keystroketest.cpp
@@ -22,7 +22,7 @@ class KeystrokeTest : public QObject
 {
     Q_OBJECT
 
-private slots:
+private Q_SLOTS:
     void initTestCase();
     void cleanupTestCase();
 
diff --git a/autotests/kjsfunctionstest.cpp b/autotests/kjsfunctionstest.cpp
index 76efb0942..ee385ec26 100644
--- a/autotests/kjsfunctionstest.cpp
+++ b/autotests/kjsfunctionstest.cpp
@@ -44,7 +44,7 @@ public:
         QVERIFY(m_clicked);
     }
 
-private slots:
+private Q_SLOTS:
     void closeMessageBox()
     {
         const QWidgetList allToplevelWidgets = QApplication::topLevelWidgets();
@@ -80,7 +80,7 @@ class KJSFunctionsTest : public QObject
 {
     Q_OBJECT
 
-private slots:
+private Q_SLOTS:
     void initTestCase();
     void testNthFieldName();
     void testDisplay();
diff --git a/autotests/mainshelltest.cpp b/autotests/mainshelltest.cpp
index 2750bdc2b..0eb046e1c 100644
--- a/autotests/mainshelltest.cpp
+++ b/autotests/mainshelltest.cpp
@@ -66,7 +66,7 @@ public:
     }
     bool foundDialog;
 
-public slots:
+public Q_SLOTS:
     void closePrintDialog();
 
 private:
@@ -83,7 +83,7 @@ public:
         return s->m_tabWidget;
     }
 
-private slots:
+private Q_SLOTS:
     void initTestCase();
     void cleanupTestCase();
     void init();
diff --git a/autotests/markdowntest.cpp b/autotests/markdowntest.cpp
index c31bc4559..4eb0959c5 100644
--- a/autotests/markdowntest.cpp
+++ b/autotests/markdowntest.cpp
@@ -17,7 +17,7 @@ class MarkdownTest : public QObject
 {
     Q_OBJECT
 
-private slots:
+private Q_SLOTS:
     void initTestCase();
 
     void testFancyPantsEnabled();
diff --git a/autotests/modifyannotationpropertiestest.cpp b/autotests/modifyannotationpropertiestest.cpp
index 94390747b..dfd948792 100644
--- a/autotests/modifyannotationpropertiestest.cpp
+++ b/autotests/modifyannotationpropertiestest.cpp
@@ -18,7 +18,7 @@ class ModifyAnnotationPropertiesTest : public QObject
 {
     Q_OBJECT
 
-private slots:
+private Q_SLOTS:
     void initTestCase();
     void cleanupTestCase();
     void init();
diff --git a/autotests/parttest.cpp b/autotests/parttest.cpp
index 939a60a35..db49fbe7b 100644
--- a/autotests/parttest.cpp
+++ b/autotests/parttest.cpp
@@ -55,7 +55,7 @@ class PartTest : public QObject
 signals:
     void urlHandler(const QUrl &url); // NOLINT(readability-inconsistent-declaration-parameter-name)
 
-private slots:
+private Q_SLOTS:
     void init();
 
     void testZoomWithCrop();
diff --git a/autotests/searchtest.cpp b/autotests/searchtest.cpp
index c082b3443..5722f3dbd 100644
--- a/autotests/searchtest.cpp
+++ b/autotests/searchtest.cpp
@@ -21,7 +21,7 @@ class SearchFinishedReceiver : public QObject
 {
     Q_OBJECT
 
-public slots:
+public Q_SLOTS:
     void searchFinished(int id, Okular::Document::SearchStatus status)
     {
         m_id = id;
@@ -37,7 +37,7 @@ class SearchTest : public QObject
 {
     Q_OBJECT
 
-private slots:
+private Q_SLOTS:
     void initTestCase();
     void testNextAndPrevious();
     void test311232();
diff --git a/autotests/shelltest.cpp b/autotests/shelltest.cpp
index e7aaf7116..f26c0f34e 100644
--- a/autotests/shelltest.cpp
+++ b/autotests/shelltest.cpp
@@ -35,7 +35,7 @@ class ShellTest : public QObject
 {
     Q_OBJECT
 
-private slots:
+private Q_SLOTS:
     void initTestCase();
     void testUrlArgs_data();
     void testUrlArgs();
diff --git a/autotests/signatureformtest.cpp b/autotests/signatureformtest.cpp
index e5797c04c..5a40b2c47 100644
--- a/autotests/signatureformtest.cpp
+++ b/autotests/signatureformtest.cpp
@@ -18,7 +18,7 @@ class SignatureFormTest : public QObject
 {
     Q_OBJECT
 
-private slots:
+private Q_SLOTS:
     void initTestCase();
     void cleanupTestCase();
     void testSignatureForm();
diff --git a/autotests/signunsignedfieldtest.cpp b/autotests/signunsignedfieldtest.cpp
index 7e3de19bf..3b84f5f48 100644
--- a/autotests/signunsignedfieldtest.cpp
+++ b/autotests/signunsignedfieldtest.cpp
@@ -46,7 +46,7 @@ class SignUnsignedFieldTest : public QObject
 {
     Q_OBJECT
 
-private slots:
+private Q_SLOTS:
     void initTestCase();
     void init();
     void cleanup();
diff --git a/autotests/translateannotationtest.cpp b/autotests/translateannotationtest.cpp
index 4385e690d..4f0aaaab8 100644
--- a/autotests/translateannotationtest.cpp
+++ b/autotests/translateannotationtest.cpp
@@ -31,7 +31,7 @@ class TranslateAnnotationTest : public QObject
 {
     Q_OBJECT
 
-private slots:
+private Q_SLOTS:
     void initTestCase();
     void cleanupTestCase();
     void init();
diff --git a/autotests/visibilitytest.cpp b/autotests/visibilitytest.cpp
index 5d2323613..6dc8c1d00 100644
--- a/autotests/visibilitytest.cpp
+++ b/autotests/visibilitytest.cpp
@@ -20,7 +20,7 @@ class VisibilityTest : public QObject
 {
     Q_OBJECT
 
-private slots:
+private Q_SLOTS:
     void initTestCase();
     void cleanupTestCase();
 
diff --git a/core/generator_p.h b/core/generator_p.h
index e45a8bc2e..07757a3f8 100644
--- a/core/generator_p.h
+++ b/core/generator_p.h
@@ -147,7 +147,7 @@ public:
     void abortExtraction();
     bool shouldAbortExtraction() const;
 
-public slots:
+public Q_SLOTS:
     void startGeneration();
 
 protected:
diff --git a/generators/chm/autotests/chmgeneratortest.cpp b/generators/chm/autotests/chmgeneratortest.cpp
index c428fa1b3..2c7696ab1 100644
--- a/generators/chm/autotests/chmgeneratortest.cpp
+++ b/generators/chm/autotests/chmgeneratortest.cpp
@@ -16,7 +16,7 @@ class ChmGeneratorTest : public QObject
 {
     Q_OBJECT
 
-private slots:
+private Q_SLOTS:
     void initTestCase();
     void testDocumentStructure();
     void testDocumentContent();
diff --git a/generators/chm/lib/ebook_search.h b/generators/chm/lib/ebook_search.h
index 9e0576bf1..97b5214db 100644
--- a/generators/chm/lib/ebook_search.h
+++ b/generators/chm/lib/ebook_search.h
@@ -57,10 +57,10 @@ public:
 signals:
     void progressStep(int value, const QString &stepName);
 
-public slots:
+public Q_SLOTS:
     void cancelIndexGeneration();
 
-private slots:
+private Q_SLOTS:
     void updateProgress(int value, const QString &stepName);
     void processEvents();
 
diff --git a/generators/chm/lib/helper_search_index.h b/generators/chm/lib/helper_search_index.h
index c6203658a..4c0d25453 100644
--- a/generators/chm/lib/helper_search_index.h
+++ b/generators/chm/lib/helper_search_index.h
@@ -81,7 +81,7 @@ public:
 signals:
     void indexingProgress(int, const QString &);
 
-public slots:
+public Q_SLOTS:
     void setLastWinClosed();
 
 private:
diff --git a/generators/comicbook/autotests/comicbooktest.cpp b/generators/comicbook/autotests/comicbooktest.cpp
index b303e9760..4ecd58f7d 100644
--- a/generators/comicbook/autotests/comicbooktest.cpp
+++ b/generators/comicbook/autotests/comicbooktest.cpp
@@ -19,7 +19,7 @@ class ComicBookGeneratorTest : public QObject
 {
     Q_OBJECT
 
-private slots:
+private Q_SLOTS:
     void initTestCase();
     void testRotatedImage();
     void cleanupTestCase();
diff --git a/generators/epub/autotests/epubgeneratortest.cpp b/generators/epub/autotests/epubgeneratortest.cpp
index 129ac8046..7ec128489 100644
--- a/generators/epub/autotests/epubgeneratortest.cpp
+++ b/generators/epub/autotests/epubgeneratortest.cpp
@@ -16,7 +16,7 @@ class EpubGeneratorTest : public QObject
 {
     Q_OBJECT
 
-private slots:
+private Q_SLOTS:
     void initTestCase();
     void testDocumentStructure();
     void testDocumentContent();
diff --git a/generators/kimgio/tests/kimgiotest.cpp b/generators/kimgio/tests/kimgiotest.cpp
index a37153a15..898dedf4b 100644
--- a/generators/kimgio/tests/kimgiotest.cpp
+++ b/generators/kimgio/tests/kimgiotest.cpp
@@ -24,7 +24,7 @@ class KIMGIOTest : public QObject
 {
     Q_OBJECT
 
-private slots:
+private Q_SLOTS:
     void initTestCase();
     void testExifOrientation_data();
     void testExifOrientation();
diff --git a/part/actionbar.cpp b/part/actionbar.cpp
index 1489128c0..eb8b62cfd 100644
--- a/part/actionbar.cpp
+++ b/part/actionbar.cpp
@@ -27,7 +27,7 @@ public:
     explicit ActionBarWidget(QToolBar *parent);
     void recreateButtons(const QList<QAction *> &actions);
 
-private slots:
+private Q_SLOTS:
     void onOrientationChanged(Qt::Orientation orientation);
 };
 
diff --git a/part/annotationactionhandler.h b/part/annotationactionhandler.h
index 9ab575c41..f16e7d399 100644
--- a/part/annotationactionhandler.h
+++ b/part/annotationactionhandler.h
@@ -45,7 +45,7 @@ public:
 signals:
     void ephemeralStampWarning();
 
-private slots:
+private Q_SLOTS:
     void slotAnnotationToolBarVisibilityChanged(bool visible);
 
 private:
diff --git a/part/tts.h b/part/tts.h
index e20bafce3..8d703a455 100644
--- a/part/tts.h
+++ b/part/tts.h
@@ -21,7 +21,7 @@ public:
     void stopAllSpeechs();
     void pauseResumeSpeech();
 
-public slots:
+public Q_SLOTS:
     void slotSpeechStateChanged(QTextToSpeech::State state);
     void slotConfigChanged();