diff --git a/CRM/Utils/SQL/TempTable.php b/CRM/Utils/SQL/TempTable.php
index cde12a0f67ef..7f1955003c7e 100644
--- a/CRM/Utils/SQL/TempTable.php
+++ b/CRM/Utils/SQL/TempTable.php
@@ -97,8 +97,8 @@ public static function build() {
     $t->id = md5(uniqid('', TRUE));
     // The constant CIVICRM_TEMP_FORCE_DURABLE is for local debugging.
     $t->durable = CRM_Utils_Constant::value('CIVICRM_TEMP_FORCE_DURABLE', FALSE);
-    // I suspect it would be better to just say utf8=true, but a lot of existing queries don't do the utf8 bit.
-    $t->utf8 = CRM_Utils_Constant::value('CIVICRM_TEMP_FORCE_UTF8', FALSE);
+    // @deprecated This constant is deprecated and will be removed.
+    $t->utf8 = CRM_Utils_Constant::value('CIVICRM_TEMP_FORCE_UTF8', TRUE);
     $t->autodrop = FALSE;
     $t->memory = FALSE;
     return $t;