diff --git a/src/panel/widgets/separator.cpp b/src/panel/widgets/separator.cpp
index a274933..88fdc6e 100644
--- a/src/panel/widgets/separator.cpp
+++ b/src/panel/widgets/separator.cpp
@@ -9,6 +9,7 @@ WayfireSeparator::WayfireSeparator(int pixels)
 
 void WayfireSeparator::init(Gtk::HBox *container)
 {
+    separator.get_style_context()->add_class("separator");
     container->pack_start(separator);
     separator.show_all();
 }