diff --git a/build-tools/build_iso/image.inc b/build-tools/build_iso/image.inc
index 8e5a346f..20b371ea 100644
--- a/build-tools/build_iso/image.inc
+++ b/build-tools/build_iso/image.inc
@@ -69,3 +69,6 @@ zip
 unzip
 traceroute
 
+# support for persistent sessions
+screen
+