diff --git a/effects/magnifier/magnifier.cpp b/effects/magnifier/magnifier.cpp
--- a/effects/magnifier/magnifier.cpp
+++ b/effects/magnifier/magnifier.cpp
@@ -77,9 +77,8 @@
     delete m_texture;
     destroyPixmap();
     // Save the zoom value.
-    KConfigGroup conf = EffectsHandler::effectConfig(QStringLiteral("Magnifier"));
-    conf.writeEntry("InitialZoom", target_zoom);
-    conf.sync();
+    MagnifierConfig::setInitialZoom(target_zoom);
+    MagnifierConfig::self()->save();
 }
 
 void MagnifierEffect::destroyPixmap()
diff --git a/effects/zoom/zoom.cpp b/effects/zoom/zoom.cpp
--- a/effects/zoom/zoom.cpp
+++ b/effects/zoom/zoom.cpp
@@ -142,9 +142,8 @@
     // switch off and free resources
     showCursor();
     // Save the zoom value.
-    KConfigGroup conf = EffectsHandler::effectConfig(QStringLiteral("Zoom"));
-    conf.writeEntry("InitialZoom", target_zoom);
-    conf.sync();
+    ZoomConfig::setInitialZoom(target_zoom);
+    ZoomConfig::self()->save();
 }
 
 void ZoomEffect::showCursor()