diff --git a/src/DockAreaWidget.h b/src/DockAreaWidget.h
index 5361926..eaf290c 100644
--- a/src/DockAreaWidget.h
+++ b/src/DockAreaWidget.h
@@ -367,7 +367,8 @@ Q_SIGNALS:
 	 */
 	void viewToggled(bool Open);
 }; // class DockAreaWidget
-}
- // namespace ads
+} // namespace ads
+
+Q_DECLARE_OPERATORS_FOR_FLAGS(ads::CDockAreaWidget::DockAreaFlags)
 //-----------------------------------------------------------------------------
 #endif // DockAreaWidgetH
diff --git a/src/DockManager.h b/src/DockManager.h
index d549a68..9ebf8a2 100644
--- a/src/DockManager.h
+++ b/src/DockManager.h
@@ -617,5 +617,7 @@ Q_SIGNALS:
     void focusedDockWidgetChanged(ads::CDockWidget* old, ads::CDockWidget* now);
 }; // class DockManager
 } // namespace ads
+
+Q_DECLARE_OPERATORS_FOR_FLAGS(ads::CDockManager::ConfigFlags)
 //-----------------------------------------------------------------------------
 #endif // DockManagerH
diff --git a/src/DockWidget.h b/src/DockWidget.h
index 39693f0..c20028b 100644
--- a/src/DockWidget.h
+++ b/src/DockWidget.h
@@ -600,7 +600,8 @@ Q_SIGNALS:
      */
     void featuresChanged(ads::CDockWidget::DockWidgetFeatures features);
 }; // class DockWidget
-}
- // namespace ads
+} // namespace ads
+
+Q_DECLARE_OPERATORS_FOR_FLAGS(ads::CDockWidget::DockWidgetFeatures)
 //-----------------------------------------------------------------------------
 #endif // DockWidgetH
diff --git a/src/ads_globals.h b/src/ads_globals.h
index 9705544..777bd82 100644
--- a/src/ads_globals.h
+++ b/src/ads_globals.h
@@ -308,5 +308,6 @@ void repolishStyle(QWidget* w, eRepolishChildOptions Options = RepolishIgnoreChi
 } // namespace internal
 } // namespace ads
 
+Q_DECLARE_OPERATORS_FOR_FLAGS(ads::DockWidgetAreas)
 //---------------------------------------------------------------------------
 #endif // ads_globalsH