diff --git a/icu4c/source/test/testdata/rbbitst.txt b/icu4c/source/test/testdata/rbbitst.txt
index 4c721e11cb..7c5f14d27f 100644
--- a/icu4c/source/test/testdata/rbbitst.txt
+++ b/icu4c/source/test/testdata/rbbitst.txt
@@ -540,7 +540,7 @@ What is the proper use of the abbreviation pp.? •Yes, I am definatelly 12" tal
 #      Surrogate line break tests.
 #
 <data>•\u4e01•\ud840\udc01•\u4e02•abc •\ue000 •\udb80\udc01•</data>  #This line and the following are equivalent.
-<data>•\u4e01•\U20001•\u4e02•abc •\ue000 •\Uf0001•</data>
+<data>•\u4e01•\U00020001•\u4e02•abc •\ue000 •\U000f0001•</data>
 
 #      Regression for bug 836
 #        Note:  Unicode 5.1 changed this behavior