diff --git a/unicodetools/data/ucd/dev/PropList.txt b/unicodetools/data/ucd/dev/PropList.txt
index e91bf1131..ee050fdd0 100644
--- a/unicodetools/data/ucd/dev/PropList.txt
+++ b/unicodetools/data/ucd/dev/PropList.txt
@@ -1,3 +1,4 @@
+1D250..1D252; Diacritic
 # PropList-16.0.0.txt
 # Date: 2024-07-25, 15:54:40 GMT
 # © 2024 Unicode®, Inc.