diff --git a/Gutenberg/plugin.php b/Gutenberg/plugin.php
index 2b335fe5..b6bc6866 100644
--- a/Gutenberg/plugin.php
+++ b/Gutenberg/plugin.php
@@ -782,6 +782,7 @@ function embedpress_pdf_render_block($attributes)
 
 		$url = !empty($attributes['href']) ? $attributes['href'] : '';
 
+		$adsAtts = '';
 		if(!empty($attributes['adManager'])) {
 			$ad = base64_encode(json_encode($attributes));
 			$adsAtts = "data-ad-id=$client_id data-ad-attrs=$ad class=ad-mask";