diff --git a/examples/pdfium/viewer-qml/main.cpp b/examples/pdfium/viewer-qml/main.cpp
index 736902d..2708f31 100644
--- a/examples/pdfium/viewer-qml/main.cpp
+++ b/examples/pdfium/viewer-qml/main.cpp
@@ -49,13 +49,13 @@ class PdfImageProvider : public QObject, public QQuickImageProvider
 
     Q_INVOKABLE void setFilename(QString filename) {
         m_pdf->loadFile(filename);
-        emit readyChanged(m_pdf->isValid());
+        Q_EMIT readyChanged(m_pdf->isValid());
     }
 
     Q_INVOKABLE QString pageText(int index) {
         return m_pdf && m_pdf->isValid() ? m_pdf->page(index).text() : "";
     }
-signals:
+Q_SIGNALS:
     void readyChanged(int);
 };
 
diff --git a/src/pdfium/qpdfium.h b/src/pdfium/qpdfium.h
index ca61aec..56aac25 100644
--- a/src/pdfium/qpdfium.h
+++ b/src/pdfium/qpdfium.h
@@ -42,7 +42,7 @@ class Q_PDFIUM_EXPORT QPdfium
     Status status() const;
     QPdfiumPage page(int i);
 
-public slots:
+public Q_SLOTS:
     Status loadFile(QString filename, QString password = QString());
 
 private:
diff --git a/tests/auto/cpp/tst_cpp.cpp b/tests/auto/cpp/tst_cpp.cpp
index cc3ce68..14d7501 100644
--- a/tests/auto/cpp/tst_cpp.cpp
+++ b/tests/auto/cpp/tst_cpp.cpp
@@ -20,7 +20,7 @@ class CppTest: public QObject
 public:
     CppTest() {
     }
-private slots:
+private Q_SLOTS:
     void initTestCase();
     void cleanupTestCase();
     void init();