diff --git a/client.cpp b/client.cpp
index 390231229b..b21a737bbb 100644
--- a/client.cpp
+++ b/client.cpp
@@ -448,7 +448,7 @@ void Client::layoutDecorationRects(QRect &left, QRect &top, QRect &right, QRect
     NETStrut strut = info->frameOverlap();
 
     // Ignore the overlap strut when compositing is disabled
-    if (!compositing())
+    if (!compositing() || !Workspace::self()->decorationSupportsFrameOverlap())
         strut.left = strut.top = strut.right = strut.bottom = 0;
     else if (strut.left == -1 && strut.top == -1 && strut.right == -1 && strut.bottom == -1)
         {
@@ -601,7 +601,8 @@ QRect Client::transparentRect() const
         return QRect();
 
     NETStrut strut = info->frameOverlap();
-    if (!compositing()) // Ignore the strut when compositing is disabled
+    // Ignore the strut when compositing is disabled or the decoration doesn't support it
+    if (!compositing() || !Workspace::self()->decorationSupportsFrameOverlap())
         strut.left = strut.top = strut.right = strut.bottom = 0;
     else if (strut.left == -1 && strut.top == -1 && strut.right == -1 && strut.bottom == -1)
         return QRect();
diff --git a/workspace.h b/workspace.h
index 759833ff60..b1281f2b27 100644
--- a/workspace.h
+++ b/workspace.h
@@ -383,6 +383,7 @@ class Workspace : public QObject, public KDecorationDefines
         bool hasDecorationShadows() const;
         bool decorationHasAlpha() const;
         bool decorationSupportsClientGrouping() const; // Returns true if the decoration supports tabs.
+        bool decorationSupportsFrameOverlap() const;
 
         // D-Bus interface
         void cascadeDesktop();
@@ -1257,6 +1258,11 @@ inline bool Workspace::decorationSupportsClientGrouping() const
     return mgr->factory()->supports( AbilityClientGrouping );
     }
 
+inline bool Workspace::decorationSupportsFrameOverlap() const
+    {
+    return mgr->factory()->supports( AbilityExtendIntoClientArea );
+    }
+
 inline void Workspace::addClientGroup( ClientGroup* group )
     {
     clientGroups.append( group );