diff --git a/src/app/common/elements/mainview.less b/src/app/common/elements/mainview.less
index 5e9e306c..224c6a2d 100644
--- a/src/app/common/elements/mainview.less
+++ b/src/app/common/elements/mainview.less
@@ -42,10 +42,10 @@
 
 // This ensures the tab bar does not collide with the floating logo. The floating logo sits above the sidebar when it is not collapsed, so no additional margin is needed in that case.
 // More margin is given on macOS to account for the traffic light buttons
-#main.platform-darwin.sidebar-collapsed .header {
+#main.platform-darwin.mainsidebar-collapsed .header {
     margin-left: var(--floating-logo-width-darwin);
 }
 
-#main:not(.platform-darwin).sidebar-collapsed .header {
+#main:not(.platform-darwin).mainsidebar-collapsed .header {
     margin-left: var(--floating-logo-width);
 }