diff --git a/grml_build/package_config/SIPWISE b/grml_build/package_config/SIPWISE
index 333074a..a8ede5d 100644
--- a/grml_build/package_config/SIPWISE
+++ b/grml_build/package_config/SIPWISE
@@ -40,6 +40,7 @@ locales
 lsof
 lsscsi
 mawk
+mmdebstrap
 mount
 mtools
 mtr-tiny