diff --git a/widgets/LazyFillComboBox.hpp b/widgets/LazyFillComboBox.hpp
index 7d9052673..37af60f0b 100644
--- a/widgets/LazyFillComboBox.hpp
+++ b/widgets/LazyFillComboBox.hpp
@@ -24,6 +24,7 @@ public:
   {
   }
 
+#if QT_VERSION >= QT_VERSION_CHECK (5, 12, 0)
   void showPopup () override
   {
     Q_EMIT about_to_show_popup ();
@@ -35,6 +36,19 @@ public:
     QComboBox::hidePopup ();
     Q_EMIT popup_hidden ();
   }
+#else
+  void mousePressEvent (QMouseEvent * e) override
+  {
+    Q_EMIT about_to_show_popup ();
+    QComboBox::mousePressEvent (e);
+  }
+
+  void mouseReleaseEvent (QMouseEvent * e) override
+  {
+    QComboBox::mouseReleaseEvent (e);
+    Q_EMIT popup_hidden ();
+  }
+#endif
 };
 
 #endif