diff --git a/blocks/site_main_menu/styles.css b/blocks/site_main_menu/styles.css
index 9f4747a49aa..226b934a06b 100644
--- a/blocks/site_main_menu/styles.css
+++ b/blocks/site_main_menu/styles.css
@@ -2,7 +2,7 @@
     clear: both;
 }
 
-.block_site_main_menu.block.list_block .unlist > li > .column {
+.block_site_main_menu.block .content > .unlist > li > .column {
     /* Made specific to win over .block.list_block .unlist > li > .column. */
     width: 100%;
     display: table;