diff --git a/icu4c/source/i18n/persncal.cpp b/icu4c/source/i18n/persncal.cpp
index 0650d4a89f60..cbd1d8e4da16 100644
--- a/icu4c/source/i18n/persncal.cpp
+++ b/icu4c/source/i18n/persncal.cpp
@@ -93,8 +93,8 @@ static void U_CALLCONV initLeapCorrection() {
     };
     gMinCorrection = nonLeapYears[0];
     icu::UnicodeSet prefab;
-    for (int32_t i = 0; i < UPRV_LENGTHOF(nonLeapYears); i++) {
-        prefab.add(nonLeapYears[i]);
+    for (auto year : nonLeapYears) {
+        prefab.add(year);
     }
     gLeapCorrection = prefab.cloneAsThawed();
     ucln_i18n_registerCleanup(UCLN_I18N_PERSIAN_CALENDAR, calendar_persian_cleanup);