diff --git a/includes/modules/export/xhtml/class-pb-xhtml11.php b/includes/modules/export/xhtml/class-pb-xhtml11.php
index <HASH>..<HASH> 100644
--- a/includes/modules/export/xhtml/class-pb-xhtml11.php
+++ b/includes/modules/export/xhtml/class-pb-xhtml11.php
@@ -563,7 +563,7 @@ class Xhtml11 extends Export {
 			printf( '<h2 class="subtitle">%s</h2>', @$metadata['pb_subtitle'] );
 			printf( '<div class="logo"></div>' );
 			printf( '<h3 class="author">%s</h3>', @$metadata['pb_author'] );
-			printf( '<h4 class="author">%s</h4>', @$metadata['pb_contributing_authors'] );
+			printf( '<h4 class="contributing-authors">%s</h4>', @$metadata['pb_contributing_authors'] );
 			printf( '<h4 class="publisher">%s</h4>', @$metadata['pb_publisher'] );
 			printf( '<h5 class="publisher-city">%s</h5>', @$metadata['pb_publisher_city'] );
 		}
changing contributing authors class, because it was breaking PDF running heads.