diff --git a/layouts/content-sidebar-sidebar.css b/layouts/content-sidebar-sidebar.css
index 3bb0a21f..98e3ee2e 100644
--- a/layouts/content-sidebar-sidebar.css
+++ b/layouts/content-sidebar-sidebar.css
@@ -3,7 +3,7 @@ Theme Name: _s
 Layout: Content-Sidebar-Sidebar
 */
 
-.site-content {
+#primary {
 	float: left;
 	width: 100%;
 }
diff --git a/layouts/content-sidebar.css b/layouts/content-sidebar.css
index fba0c662..edf558d8 100644
--- a/layouts/content-sidebar.css
+++ b/layouts/content-sidebar.css
@@ -3,7 +3,7 @@ Theme Name: _s
 Layout: Content-Sidebar
 */
 
-.site-content {
+#primary {
 	float: left;
 	margin: 0 -25% 0 0;
 	width: 100%;
diff --git a/layouts/sidebar-content-sidebar.css b/layouts/sidebar-content-sidebar.css
index 706ee13b..9081318a 100644
--- a/layouts/sidebar-content-sidebar.css
+++ b/layouts/sidebar-content-sidebar.css
@@ -3,7 +3,7 @@ Theme Name: _s
 Layout: Sidebar-Content-Sidebar
 */
 
-.site-content {
+#primary {
 	float: left;
 	width: 100%;
 }
diff --git a/layouts/sidebar-content.css b/layouts/sidebar-content.css
index 4be0ec4d..6fe41c2b 100644
--- a/layouts/sidebar-content.css
+++ b/layouts/sidebar-content.css
@@ -3,7 +3,7 @@ Theme Name: _s
 Layout: Sidebar-Content
 */
 
-.site-content {
+#primary {
 	float: right;
 	margin: 0 0 0 -25%;
 	width: 100%;
diff --git a/layouts/sidebar-sidebar-content.css b/layouts/sidebar-sidebar-content.css
index 76f59881..93134584 100644
--- a/layouts/sidebar-sidebar-content.css
+++ b/layouts/sidebar-sidebar-content.css
@@ -3,7 +3,7 @@ Theme Name: _s
 Layout: Sidebar-Sidebar-Content
 */
 
-.site-content {
+#primary {
 	float: right;
 	margin: 0 0 0 -40%;
 	width: 100%;