diff --git a/icu4c/source/test/intltest/usettest.cpp b/icu4c/source/test/intltest/usettest.cpp
index 9de6e5f0ff..2b9c66d2c4 100644
--- a/icu4c/source/test/intltest/usettest.cpp
+++ b/icu4c/source/test/intltest/usettest.cpp
@@ -870,18 +870,18 @@ void UnicodeSetTest::copyWithIterator(UnicodeSet& t, const UnicodeSet& s, UBool
     UnicodeSetIterator it(s);
     if (withRange) {
         while (it.nextRange()) {
-            if (it.codepoint == UnicodeSetIterator::IS_STRING) {
-                t.add(*it.string);
+            if (it.isString()) {
+                t.add(it.getString());
             } else {
-                t.add(it.codepoint, it.codepointEnd);
+                t.add(it.getCodepoint(), it.getCodepointEnd());
             }
         }
     } else {
         while (it.next()) {
-            if (it.codepoint == UnicodeSetIterator::IS_STRING) {
-                t.add(*it.string);
+            if (it.isString()) {
+                t.add(it.getString());
             } else {
-                t.add(it.codepoint);
+                t.add(it.getCodepoint());
             }
         }
     }