diff --git a/Ext2Mgr/super.h b/Ext2Mgr/super.h
index c1c5e1e..4bf3d81 100644
--- a/Ext2Mgr/super.h
+++ b/Ext2Mgr/super.h
@@ -230,6 +230,7 @@ struct ext4_super_block {
 					 EXT4_FEATURE_INCOMPAT_EXTENTS| \
 					 EXT4_FEATURE_INCOMPAT_64BIT| \
 					 EXT4_FEATURE_INCOMPAT_FLEX_BG| \
+					 EXT4_FEATURE_INCOMPAT_CASEFOLD| \
 					 EXT4_FEATURE_INCOMPAT_CSUM_SEED)
 
 /* Definitions for other common filesystems so the application can list them. */
diff --git a/Ext4Fsd/include/linux/ext4.h b/Ext4Fsd/include/linux/ext4.h
index db935a5..31a9631 100644
--- a/Ext4Fsd/include/linux/ext4.h
+++ b/Ext4Fsd/include/linux/ext4.h
@@ -1721,6 +1721,7 @@ EXT4_FEATURE_INCOMPAT_FUNCS(encrypt,		ENCRYPT)
 					 EXT4_FEATURE_INCOMPAT_EXTENTS| \
 					 EXT4_FEATURE_INCOMPAT_64BIT| \
 					 EXT4_FEATURE_INCOMPAT_FLEX_BG| \
+					 EXT4_FEATURE_INCOMPAT_CASEFOLD| \
 					 EXT4_FEATURE_INCOMPAT_CSUM_SEED)
 #define EXT4_FEATURE_RO_COMPAT_SUPP	( \
                      EXT4_FEATURE_RO_COMPAT_SPARSE_SUPER| \