diff --git a/php/ad-servers/class-ad-layers-ad-server.php b/php/ad-servers/class-ad-layers-ad-server.php
index 3b49f8c..95c849d 100644
--- a/php/ad-servers/class-ad-layers-ad-server.php
+++ b/php/ad-servers/class-ad-layers-ad-server.php
@@ -223,7 +223,7 @@ public function get_ad_units() {
 		 */
 		public function get_ad_unit( $ad_unit, $echo = true ) {
 			if ( ! empty( $this->ad_server ) ) {
-				$this->ad_server->get_ad_unit( $ad_unit, $echo );
+				return $this->ad_server->get_ad_unit( $ad_unit, $echo );
 			}
 		}