diff --git a/shell_client.cpp b/shell_client.cpp
--- a/shell_client.cpp
+++ b/shell_client.cpp
@@ -216,6 +216,17 @@
             doSetGeometry(QRect(geom.topLeft(), m_clientSize + QSize(borderLeft() + borderRight(), borderTop() + borderBottom())));
         }
     );
+    connect(s, &SurfaceInterface::scaleChanged, this,
+        [this] {
+            if (!m_unmapped) {
+                addWorkspaceRepaint(visibleRect());
+            }
+            //even though the geometry in workspace co-ordinates is the same
+            //we need to rebuild our window quads
+            emit geometryShapeChanged(this, geom);
+        }
+    );
+
     connect(s, &SurfaceInterface::unmapped, this, &ShellClient::unmap);
     connect(s, &SurfaceInterface::unbound, this, &ShellClient::destroyClient);
     connect(s, &SurfaceInterface::destroyed, this, &ShellClient::destroyClient);