diff --git a/calamares/modules/partition.conf b/calamares/modules/partition.conf
index b03c855..1d406fd 100644
--- a/calamares/modules/partition.conf
+++ b/calamares/modules/partition.conf
@@ -142,7 +142,7 @@ initialSwapChoice: none
 # If nothing is specified, Calamares defaults to "ext4".
 #
 # Names are case-sensitive and defined by KPMCore.
-defaultFileSystemType:  "ext4"
+defaultFileSystemType:  "btrfs"
 
 # Selectable filesystem type, used when "erase" is done.
 #