diff --git a/mkosi.presets/20-final/mkosi.conf b/mkosi.presets/20-final/mkosi.conf
index c219b868f3..ec0a90feff 100644
--- a/mkosi.presets/20-final/mkosi.conf
+++ b/mkosi.presets/20-final/mkosi.conf
@@ -26,6 +26,7 @@ Packages=
         qrencode
         sed
         strace
+        tmux
         tree
         util-linux
         valgrind