diff --git a/phpBB/phpbb/captcha/plugins/legacy_wrapper.php b/phpBB/phpbb/captcha/plugins/legacy_wrapper.php
index 5f2c701e07..9ce4973827 100644
--- a/phpBB/phpbb/captcha/plugins/legacy_wrapper.php
+++ b/phpBB/phpbb/captcha/plugins/legacy_wrapper.php
@@ -145,6 +145,19 @@ class legacy_wrapper implements plugin_interface
 		return PHP_INT_MAX;
 	}
 
+	/**
+	 * {@inheritDoc}
+	 */
+	public function get_template(): string
+	{
+		if (method_exists($this->legacy_captcha, 'get_template'))
+		{
+			return $this->legacy_captcha->get_template();
+		}
+
+		return '';
+	}
+
 	/**
 	 * {@inheritDoc}
 	 */
diff --git a/phpBB/phpbb/captcha/plugins/plugin_interface.php b/phpBB/phpbb/captcha/plugins/plugin_interface.php
index 9286c4867e..0f668f207e 100644
--- a/phpBB/phpbb/captcha/plugins/plugin_interface.php
+++ b/phpBB/phpbb/captcha/plugins/plugin_interface.php
@@ -89,7 +89,14 @@ interface plugin_interface
 	public function get_attempt_count(): int;
 
 	/**
-	 * Get template data for demo
+	 * Get template filename for captcha
+	 *
+	 * @return string Template file name
+	 */
+	public function get_template(): string;
+
+	/**
+	 * Get template filename for demo
 	 *
 	 * @return string Demo template file name
 	 */