diff --git a/fs/ntfs3/index.c b/fs/ntfs3/index.c
index 2dfe74a3de75..139bdaececd7 100644
--- a/fs/ntfs3/index.c
+++ b/fs/ntfs3/index.c
@@ -617,7 +617,7 @@ static bool index_hdr_check(const struct INDEX_HDR *hdr, u32 bytes)
 	u32 off = le32_to_cpu(hdr->de_off);
 
 	if (!IS_ALIGNED(off, 8) || tot > bytes || end > tot ||
-	    off + sizeof(struct NTFS_DE) > end) {
+	    size_add(off, sizeof(struct NTFS_DE)) > end) {
 		/* incorrect index buffer. */
 		return false;
 	}
@@ -736,7 +736,7 @@ fill_table:
 	if (end > total)
 		return NULL;
 
-	if (off + sizeof(struct NTFS_DE) > end)
+	if (size_add(off, sizeof(struct NTFS_DE)) > end)
 		return NULL;
 
 	e = Add2Ptr(hdr, off);