diff --git a/kcms/workspaceoptions/workspaceoptions.cpp b/kcms/workspaceoptions/workspaceoptions.cpp
--- a/kcms/workspaceoptions/workspaceoptions.cpp
+++ b/kcms/workspaceoptions/workspaceoptions.cpp
@@ -76,6 +76,7 @@
         cg.writeEntry("Enabled", m_ui->showOsd->isChecked());
     }
 
+    config->sync();
 }
 
 void WorkspaceOptionsModule::load()