diff --git a/libs/plugins/shared.mb_str_replace.php b/libs/plugins/shared.mb_str_replace.php
index 206cf9ea..226d9035 100644
--- a/libs/plugins/shared.mb_str_replace.php
+++ b/libs/plugins/shared.mb_str_replace.php
@@ -44,7 +44,7 @@ if (!function_exists('smarty_mb_str_replace')) {
                 }
             }
         } else {
-            $parts = mb_split(preg_quote($search), $subject);
+            $parts = mb_split(preg_quote($search), $subject) ?: array();
             $count = count($parts) - 1;
             $subject = implode($replace, $parts);
         }