diff --git a/examples/Examples.h b/examples/Examples.h
index c542b29..896842a 100644
--- a/examples/Examples.h
+++ b/examples/Examples.h
@@ -30,8 +30,9 @@ class Examples : public QWidget
     FilterDates* getFilterDates();
     FilterStrings* getFilterStrings();
     QVBoxLayout* createLeftWidgetColumn();
-    QGroupBox* wrapProgressBar(const QString& name, ProgressBar* progressBar,
-                               QPushButton* startStopButton);
+    static QGroupBox* wrapProgressBar(const QString& name,
+                                      ProgressBar* progressBar,
+                                      QPushButton* startStopButton);
     QGroupBox* createProgressBarInfinite();
     QGroupBox* createProgressBarCounter();
     QVBoxLayout* createRightWidgetColumn();