diff --git a/kcmkwin/kwindecoration/kwindecoration.cpp b/kcmkwin/kwindecoration/kwindecoration.cpp
index d24f29830b..d4ca550320 100644
--- a/kcmkwin/kwindecoration/kwindecoration.cpp
+++ b/kcmkwin/kwindecoration/kwindecoration.cpp
@@ -364,6 +364,8 @@ void KWinDecorationModule::slotGHNSClicked()
                 if (proxyIndex.isValid())
                     m_ui->decorationList->rootObject()->setProperty("currentIndex", proxyIndex.row());
             }
+            m_lastPreviewWidth = 0;
+            updatePreviews();
         }
     }
     delete downloadDialog;