diff --git a/src/private/WidgetResizeHandler.cpp b/src/private/WidgetResizeHandler.cpp
index 41fe412a..a41dab3f 100644
--- a/src/private/WidgetResizeHandler.cpp
+++ b/src/private/WidgetResizeHandler.cpp
@@ -605,8 +605,8 @@ bool CustomFrameHelper::nativeEventFilter(const QByteArray &eventType, void *mes
     if (!window)
         return false;
 
-    const Features features = m_shouldUseCustomFrameFunc(window);
-    if (features == Feature_None) {
+    const WidgetResizeHandler::Features features = m_shouldUseCustomFrameFunc(window);
+    if (!features) {
         // No native support for is desired for this window
         return false;
     }
diff --git a/src/private/WidgetResizeHandler_p.h b/src/private/WidgetResizeHandler_p.h
index 38ac6e16..93373a87 100644
--- a/src/private/WidgetResizeHandler_p.h
+++ b/src/private/WidgetResizeHandler_p.h
@@ -31,11 +31,21 @@ namespace KDDockWidgets {
 
 class FloatingWindow;
 
+
 class DOCKS_EXPORT WidgetResizeHandler : public QObject
 {
     Q_OBJECT
 public:
 
+    enum Feature {
+        Feature_None = 0,
+        Feature_NativeShadow = 1,
+        Feature_NativeResize = 2,
+        Feature_NativeDrag = 4,
+        Feature_NativeMaximize = 8
+    };
+    Q_DECLARE_FLAGS(Features, Feature);
+
     /**
      * @brief CTOR
      * @param isTopLevelResizer If true, then this resize handler is for top-level widgets (aka windows)
@@ -130,17 +140,7 @@ class DOCKS_EXPORT CustomFrameHelper
 {
     Q_OBJECT
 public:
-
-    enum Feature {
-        Feature_None = 0,
-        Feature_NativeShadow = 1,
-        Feature_NativeResize = 2,
-        Feature_NativeDrag = 4,
-        Feature_NativeMaximize = 8
-    };
-    Q_DECLARE_FLAGS(Features, Feature);
-    typedef Features (*ShouldUseCustomFrame)(QWindow *);
-
+    typedef WidgetResizeHandler::Features (*ShouldUseCustomFrame)(QWindow *);
     explicit CustomFrameHelper(ShouldUseCustomFrame shouldUseCustomFrameFunc,
                                QObject *parent = nullptr);
     ~CustomFrameHelper() override;