diff --git a/src/sidenav-nav.styl b/src/sidenav-nav.styl
index 3612356..55402cb 100644
--- a/src/sidenav-nav.styl
+++ b/src/sidenav-nav.styl
@@ -5,4 +5,8 @@
     clear: both;
     list-style: none;
     width: 100%;
+
+    &.expanded {
+        // keep this style
+    }
 }