diff --git a/reactos/drivers/filesystems/ntfs/attrib.c b/reactos/drivers/filesystems/ntfs/attrib.c
index b29f897863c..5ccbe212f4e 100644
--- a/reactos/drivers/filesystems/ntfs/attrib.c
+++ b/reactos/drivers/filesystems/ntfs/attrib.c
@@ -175,6 +175,16 @@ NtfsDumpIndexRootAttribute(PATTRIBUTE Attribute)
         ASSERT(IndexRootAttr->CollationRule == COLLATION_FILE_NAME);
 
     DbgPrint("  $INDEX_ROOT (%uB, %u) ", IndexRootAttr->SizeOfEntry, IndexRootAttr->ClustersPerIndexRecord);
+
+    if (IndexRootAttr->Header.Flags == INDEX_ROOT_SMALL)
+    {
+        DbgPrint(" (small) ");
+    }
+    else
+    {
+        ASSERT(IndexRootAttr->Header.Flags == INDEX_ROOT_LARGE);
+        DbgPrint(" (large) ");
+    }
 }
 
 
diff --git a/reactos/drivers/filesystems/ntfs/ntfs.h b/reactos/drivers/filesystems/ntfs/ntfs.h
index 59716fcf73e..3782c011a86 100644
--- a/reactos/drivers/filesystems/ntfs/ntfs.h
+++ b/reactos/drivers/filesystems/ntfs/ntfs.h
@@ -194,6 +194,8 @@ typedef enum
 #define COLLATION_NTOFS_SECURITY_HASH 0x12
 #define COLLATION_NTOFS_ULONGS        0x13
 
+#define INDEX_ROOT_SMALL 0x0
+#define INDEX_ROOT_LARGE 0x1
 
 typedef struct
 {
@@ -311,6 +313,15 @@ typedef struct
     WCHAR Name[1];
 } FILENAME_ATTRIBUTE, *PFILENAME_ATTRIBUTE;
 
+typedef struct
+{
+    ULONG FirstEntryOffset;
+    ULONG TotalSizeOfEntries;
+    ULONG AllocatedSize;
+    UCHAR Flags;
+    UCHAR Padding[3];
+} INDEX_HEADER_ATTRIBUTE, *PINDEX_HEADER_ATTRIBUTE;
+
 typedef struct
 {
     ULONG AttributeType;
@@ -318,6 +329,7 @@ typedef struct
     ULONG SizeOfEntry;
     UCHAR ClustersPerIndexRecord;
     UCHAR Padding[3];
+    INDEX_HEADER_ATTRIBUTE Header;
 } INDEX_ROOT_ATTRIBUTE, *PINDEX_ROOT_ATTRIBUTE;
 
 typedef struct