diff --git a/abstract_client.h b/abstract_client.h
index a934410acd..7f746bc51b 100644
--- a/abstract_client.h
+++ b/abstract_client.h
@@ -109,6 +109,23 @@ public:
     virtual void growVertical();
     virtual void shrinkVertical();
 
+    /**
+     * These values represent positions inside an area
+     */
+    enum Position {
+        // without prefix, they'd conflict with Qt::TopLeftCorner etc. :(
+        PositionCenter         = 0x00,
+        PositionLeft           = 0x01,
+        PositionRight          = 0x02,
+        PositionTop            = 0x04,
+        PositionBottom         = 0x08,
+        PositionTopLeft        = PositionLeft | PositionTop,
+        PositionTopRight       = PositionRight | PositionTop,
+        PositionBottomLeft     = PositionLeft | PositionBottom,
+        PositionBottomRight    = PositionRight | PositionBottom
+    };
+    virtual Position titlebarPosition() const = 0;
+
     // TODO: remove boolean trap
     static bool belongToSameApplication(const AbstractClient* c1, const AbstractClient* c2, bool active_hack = false);
 
diff --git a/client.h b/client.h
index 146db86982..345f2ffe29 100644
--- a/client.h
+++ b/client.h
@@ -620,22 +620,7 @@ public:
     bool isClientSideDecorated() const;
     bool wantsShadowToBeRendered() const override;
 
-    /**
-     * These values represent positions inside an area
-     */
-    enum Position {
-        // without prefix, they'd conflict with Qt::TopLeftCorner etc. :(
-        PositionCenter         = 0x00,
-        PositionLeft           = 0x01,
-        PositionRight          = 0x02,
-        PositionTop            = 0x04,
-        PositionBottom         = 0x08,
-        PositionTopLeft        = PositionLeft | PositionTop,
-        PositionTopRight       = PositionRight | PositionTop,
-        PositionBottomLeft     = PositionLeft | PositionBottom,
-        PositionBottomRight    = PositionRight | PositionBottom
-    };
-    Position titlebarPosition() const;
+    Position titlebarPosition() const override;
 
     void layoutDecorationRects(QRect &left, QRect &top, QRect &right, QRect &bottom) const;