diff --git a/tdeio/tdefile/kpropertiesdialog.cpp b/tdeio/tdefile/kpropertiesdialog.cpp
index fe2401191..ea2723fd0 100644
--- a/tdeio/tdefile/kpropertiesdialog.cpp
+++ b/tdeio/tdefile/kpropertiesdialog.cpp
@@ -1030,8 +1030,8 @@ KFilePropsPlugin::KFilePropsPlugin( KPropertiesDialog *_props )
     sizelay->addWidget(m_sizeStopButton, 0);
     sizelay->addStretch(10); // so that the buttons don't grow horizontally
 
-    // auto-launch for local dirs only, and not for '/'
-    if ( isLocal && !hasRoot )
+    // auto-launch for local dirs only, but not for '/' or medias
+    if ( isReallyLocal && !hasRoot )
     {
       m_sizeDetermineButton->setText( i18n("Refresh") );
       slotSizeDetermine();