diff --git a/unicodetools/data/ucd/dev/Blocks.txt b/unicodetools/data/ucd/dev/Blocks.txt
index 1517dde0c..3ed1d8fe2 100644
--- a/unicodetools/data/ucd/dev/Blocks.txt
+++ b/unicodetools/data/ucd/dev/Blocks.txt
@@ -291,6 +291,7 @@ FFF0..FFFF; Specials
 12000..123FF; Cuneiform
 12400..1247F; Cuneiform Numbers and Punctuation
 12480..1254F; Early Dynastic Cuneiform
+12550..1268F; Archaic Cuneiform Numerals
 12F90..12FFF; Cypro-Minoan
 13000..1342F; Egyptian Hieroglyphs
 13430..1345F; Egyptian Hieroglyph Format Controls
diff --git a/unicodetools/src/main/resources/org/unicode/text/UCD/ShortBlockNames.txt b/unicodetools/src/main/resources/org/unicode/text/UCD/ShortBlockNames.txt
index eaa03a0f7..b1ab5496b 100644
--- a/unicodetools/src/main/resources/org/unicode/text/UCD/ShortBlockNames.txt
+++ b/unicodetools/src/main/resources/org/unicode/text/UCD/ShortBlockNames.txt
@@ -15,6 +15,7 @@ Arabic_Math	;	Arabic_Mathematical_Alphabetic_Symbols
 Arabic_PF_A	;	Arabic_Presentation_Forms_A
 Arabic_PF_B	;	Arabic_Presentation_Forms_B
 Arabic_Sup	;	Arabic_Supplement
+Archaic_Cuneiform_Numerals	;	Archaic_Cuneiform_Numerals
 Armenian	;	Armenian
 Arrows	;	Arrows
 Avestan	;	Avestan