diff --git a/CRM/Utils/Number.php b/CRM/Utils/Number.php
index 5262c3510600..da5db035c5aa 100644
--- a/CRM/Utils/Number.php
+++ b/CRM/Utils/Number.php
@@ -118,6 +118,7 @@ public static function formatUnitSize($size, $checkForPostMax = FALSE) {
    */
   public static function formatLocaleNumeric(string $amount, $locale = NULL): string {
     if ($amount === "") {
+      CRM_Core_Error::deprecatedWarning('Passing an empty string for amount is deprecated.');
       return $amount;
     }