diff --git a/mkosi.repart/10-root.conf b/mkosi.repart/10-root.conf
index 3c25dbfb14..715b925463 100644
--- a/mkosi.repart/10-root.conf
+++ b/mkosi.repart/10-root.conf
@@ -2,7 +2,7 @@
 
 [Partition]
 Type=root
-Format=btrfs
+Format=ext4
 CopyFiles=/
 SizeMinBytes=8G
 SizeMaxBytes=8G