diff --git a/src/modules/sway/workspaces.cpp b/src/modules/sway/workspaces.cpp
index 0c9b554f..0f85feed 100644
--- a/src/modules/sway/workspaces.cpp
+++ b/src/modules/sway/workspaces.cpp
@@ -322,6 +322,11 @@ auto Workspaces::update() -> void {
     } else {
       button.get_style_context()->remove_class("persistent");
     }
+    if ((*it)["nodes"].size() == 0) {
+      button.get_style_context()->add_class("empty");
+    } else {
+      button.get_style_context()->remove_class("empty");
+    }
     if ((*it)["output"].isString()) {
       if (((*it)["output"].asString()) == bar_.output->name) {
         button.get_style_context()->add_class("current_output");