diff --git a/icu4c/source/test/cintltst/cucdtst.c b/icu4c/source/test/cintltst/cucdtst.c
index 26a934fbd5e..75e901b49a4 100644
--- a/icu4c/source/test/cintltst/cucdtst.c
+++ b/icu4c/source/test/cintltst/cucdtst.c
@@ -1846,7 +1846,7 @@ static void TestUScriptCodeAPI(){
     {
         UErrorCode err = U_ZERO_ERROR;
         int32_t capacity=0;
-        UScriptCode jaCode[2]={ USCRIPT_KATAKANA,USCRIPT_HIRAGANA};
+        UScriptCode jaCode[]={ USCRIPT_KATAKANA,USCRIPT_HIRAGANA,USCRIPT_HAN};
         UScriptCode script[10]={USCRIPT_INVALID_CODE};
         int32_t num = uscript_getCode("ja",script,capacity, &err);
         /* preflight */