diff --git a/abstract_client.cpp b/abstract_client.cpp
index b6b4707a8d..ddbc58e0cd 100644
--- a/abstract_client.cpp
+++ b/abstract_client.cpp
@@ -55,6 +55,11 @@ bool AbstractClient::untab(const QRect &toGeometry, bool clientRemoved)
     return false;
 }
 
+bool AbstractClient::isCurrentTab() const
+{
+    return true;
+}
+
 void AbstractClient::growHorizontal()
 {
 }
diff --git a/abstract_client.h b/abstract_client.h
index 7f746bc51b..4e95edc7f5 100644
--- a/abstract_client.h
+++ b/abstract_client.h
@@ -37,6 +37,11 @@ class TabBoxClientImpl;
 class AbstractClient : public Toplevel
 {
     Q_OBJECT
+    /**
+     * Whether this Client is the currently visible Client in its Client Group (Window Tabs).
+     * For change connect to the visibleChanged signal on the Client's Group.
+     **/
+    Q_PROPERTY(bool isCurrentTab READ isCurrentTab)
 public:
     virtual ~AbstractClient();
 
@@ -80,6 +85,7 @@ public:
     virtual void setKeepBelow(bool) = 0;
     virtual TabGroup *tabGroup() const;
     Q_INVOKABLE virtual bool untab(const QRect &toGeometry = QRect(), bool clientRemoved = false);
+    virtual bool isCurrentTab() const;
     virtual MaximizeMode maximizeMode() const = 0;
     virtual void maximize(MaximizeMode) = 0;
     virtual bool noBorder() const = 0;
diff --git a/client.h b/client.h
index 345f2ffe29..0579176962 100644
--- a/client.h
+++ b/client.h
@@ -238,11 +238,6 @@ class Client
      * The "Window Tabs" Group this Client belongs to.
      **/
     Q_PROPERTY(KWin::TabGroup* tabGroup READ tabGroup NOTIFY tabGroupChanged SCRIPTABLE false)
-    /**
-     * Whether this Client is the currently visible Client in its Client Group (Window Tabs).
-     * For change connect to the visibleChanged signal on the Client's Group.
-     **/
-    Q_PROPERTY(bool isCurrentTab READ isCurrentTab)
     /**
      * Minimum size as specified in WM_NORMAL_HINTS
      **/
@@ -584,7 +579,7 @@ public:
     *   client, this function stops it.
     */
     void dontMoveResize();
-    bool isCurrentTab() const;
+    bool isCurrentTab() const override;
 
     /**
      * Whether or not the window has a strut that expands through the invisible area of