diff --git a/modules/oe_theme_helper/src/TwigExtension/TwigExtension.php b/modules/oe_theme_helper/src/TwigExtension/TwigExtension.php
index 7a3156de3..11c15ad08 100644
--- a/modules/oe_theme_helper/src/TwigExtension/TwigExtension.php
+++ b/modules/oe_theme_helper/src/TwigExtension/TwigExtension.php
@@ -459,6 +459,13 @@ protected function getIconPath(array $context, string $icon): string {
    *   The trimmed output.
    */
   public function smartTrim(Environment $env, $input, $limit = 0) {
+    if ($limit === NULL) {
+      // phpcs:disable Drupal.Semantics.FunctionTriggerError
+      @trigger_error('Using the smart_trim filter with a null limit value is deprecated in oe_theme:3.x and will be removed in oe_theme:4.x releases.', E_USER_DEPRECATED);
+      // phpcs:enable
+      $limit = 0;
+    }
+
     // Bubbles Twig template argument's cacheability & attachment metadata.
     $this->bubbleArgMetadata($input);
     $truncate = new TruncateHTML();