diff --git a/src/apps/installer/CopyEngine.cpp b/src/apps/installer/CopyEngine.cpp
index 30e8d33ef8..a7a5a15bc1 100644
--- a/src/apps/installer/CopyEngine.cpp
+++ b/src/apps/installer/CopyEngine.cpp
@@ -268,7 +268,7 @@ TargetVisitor::TargetVisitor(BMenu *menu)
 bool
 TargetVisitor::Visit(BDiskDevice *device)
 {
-	if (device->IsReadOnly())
+	if (device->IsReadOnly() || device->IsReadOnlyMedia())
 		return false;
 	BPath path;
 	if (device->GetPath(&path)==B_OK)