diff --git a/wallpaper.cpp b/wallpaper.cpp
index 9a87b762e..630b890f4 100644
--- a/wallpaper.cpp
+++ b/wallpaper.cpp
@@ -190,7 +190,7 @@ void Wallpaper::init(const KConfigGroup &config)
     Q_UNUSED(config);
 }
 
-void Wallpaper::save(KConfigGroup config)
+void Wallpaper::save(KConfigGroup &config)
 {
     Q_UNUSED(config);
 }
diff --git a/wallpaper.h b/wallpaper.h
index cde07f517..557c0c864 100644
--- a/wallpaper.h
+++ b/wallpaper.h
@@ -153,7 +153,7 @@ class PLASMA_EXPORT Wallpaper : public QObject
          * This method is called when settings need to be saved.
          * @param config Config group to save settings
          **/
-        virtual void save(KConfigGroup config);
+        virtual void save(KConfigGroup &config);
 
         /**
          * Returns widget for configuration dialog.