diff --git a/src/wp-content/themes/twentyseventeen/assets/css/editor-blocks.css b/src/wp-content/themes/twentyseventeen/assets/css/editor-blocks.css
index 60170e8e0a..6b6bd47220 100644
--- a/src/wp-content/themes/twentyseventeen/assets/css/editor-blocks.css
+++ b/src/wp-content/themes/twentyseventeen/assets/css/editor-blocks.css
@@ -674,6 +674,7 @@ table.wp-block-table tr {
 	border-bottom: 1px solid #eee;
 }
 
+table.wp-block-table th,
 table.wp-block-table td {
 	border: 0;
 	padding: 0.4em;