diff --git a/single.php b/single.php
index ac78d814..7e3277ea 100644
--- a/single.php
+++ b/single.php
@@ -73,7 +73,14 @@ if (function_exists('roi_render_component')) {
 			<!-- Ad After Related Posts -->
 			<?php
 			if (function_exists('roi_render_ad_slot')) {
-				echo roi_render_ad_slot('after-related');
+				$afterRelatedAd = roi_render_ad_slot('after-related');
+				if (!empty($afterRelatedAd)) {
+					echo $afterRelatedAd;
+				} else {
+					echo '<!-- DEBUG: after-related slot returned empty -->';
+				}
+			} else {
+				echo '<!-- DEBUG: roi_render_ad_slot function not found -->';
 			}
 			?>