diff --git a/libntfs-3g/unistr.c b/libntfs-3g/unistr.c
index 753acc08..54cfd469 100644
--- a/libntfs-3g/unistr.c
+++ b/libntfs-3g/unistr.c
@@ -1291,7 +1291,8 @@ void ntfs_upcase_table_build(ntfschar *uc, u32 uc_len)
 		{ 0x3c2, 0x3c2,  0x0, 2, 6, 1 },
 		{ 0x3d7, 0x3d7, -0x8, 2, 6, 1 },
 		{ 0x515, 0x523, -0x1, 2, 6, 1 },
-		{ 0x1d79, 0x1d79, 0x8a04, 2, 6, 1 },
+			/* below, -0x75fc stands for 0x8a04 and truncation */
+		{ 0x1d79, 0x1d79, -0x75fc, 2, 6, 1 },
 		{ 0x1efb, 0x1eff, -0x1, 2, 6, 1 },
 		{ 0x1fc3, 0x1ff3,  0x9, 48, 6, 1 },
 		{ 0x1fcc, 0x1ffc,  0x0, 48, 6, 1 },