+@@ -504,6 +504,7 @@ struct ext3_super_block {
+ #define EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER 0x0001
+ #define EXT3_FEATURE_RO_COMPAT_LARGE_FILE 0x0002
+ #define EXT3_FEATURE_RO_COMPAT_BTREE_DIR 0x0004
++#define EXT3_FEATURE_RO_COMPAT_DIR_NLINK 0x0020
+
+ #define EXT3_FEATURE_INCOMPAT_COMPRESSION 0x0001
+ #define EXT3_FEATURE_INCOMPAT_FILETYPE 0x0002
+@@ -517,6 +518,7 @@ struct ext3_super_block {
+ EXT3_FEATURE_INCOMPAT_EXTENTS)
+ #define EXT3_FEATURE_RO_COMPAT_SUPP (EXT3_FEATURE_RO_COMPAT_SPARSE_SUPER| \
+ EXT3_FEATURE_RO_COMPAT_LARGE_FILE| \
++ EXT3_FEATURE_RO_COMPAT_DIR_NLINK| \
+ EXT3_FEATURE_RO_COMPAT_BTREE_DIR)
+
+ /*