diff --git a/static/styles/night_mode.css b/static/styles/night_mode.css
index 8637a7efa3..00c4057ce4 100644
--- a/static/styles/night_mode.css
+++ b/static/styles/night_mode.css
@@ -26,7 +26,7 @@ body.night-mode .message_embed .data-container::after {
 body.night-mode .column-left .left-sidebar,
 body.night-mode #settings_page .form-sidebar,
 body.night-mode .column-right .right-sidebar {
-    border-left-color: hsla(0, 0%, 0%, 0.2);
+    border-color: hsla(0, 0%, 0%, 0.2);
 }
 
 body.night-mode .dark .message_label_clickable.stream_label,