diff --git a/php/src/Utilities.php b/php/src/Utilities.php
index f0451ae..47f4e5a 100644
--- a/php/src/Utilities.php
+++ b/php/src/Utilities.php
@@ -140,7 +140,7 @@ public static function prepareQueryData($litSettings)
             "epiphany"       => $litSettings->Epiphany,
             "ascension"      => $litSettings->Ascension,
             "corpus_christi" => $litSettings->CorpusChristi,
-            "locale"         => $litSettings->LOCALE
+            "locale"         => $litSettings->Locale
         ];
         if ($litSettings->NationalCalendar !== null) {
             $queryData["national_calendar"] = $litSettings->NationalCalendar;