1 files changed, 2 insertions, 1 deletions
diff --git a/ctree.h b/ctree.h
index 2e1e6317..21b04458 100644
--- a/ctree.h
+++ b/ctree.h
@@ -483,7 +483,8 @@ struct btrfs_super_block {
 
 #define BTRFS_FEATURE_COMPAT_SUPP		0ULL
 
-#define BTRFS_FEATURE_COMPAT_RO_SUPP		0ULL
+#define BTRFS_FEATURE_COMPAT_RO_SUPP			\
+	(BTRFS_FEATURE_COMPAT_RO_FREE_SPACE_TREE)
 
 #define BTRFS_FEATURE_INCOMPAT_SUPP			\
 	(BTRFS_FEATURE_INCOMPAT_MIXED_BACKREF |		\