diff --git a/Source/domainset/download.conf b/Source/domainset/download.conf
index 6c46ea75..93f5ff7c 100644
--- a/Source/domainset/download.conf
+++ b/Source/domainset/download.conf
@@ -156,3 +156,5 @@ mirrors.edge.kernel.org
 releases.whatpulse.org
 # GIMP
 download.gimp.org
+# ReactOS
+.iso.reactos.org