diff --git a/include/bar.hpp b/include/bar.hpp
index 43756bfd..936bc749 100644
--- a/include/bar.hpp
+++ b/include/bar.hpp
@@ -54,7 +54,7 @@ class BarIpcClient;
 }
 #endif  // HAVE_SWAY
 
-class Bar {
+class Bar : public sigc::trackable {
  public:
   using bar_mode_map = std::map<std::string, struct bar_mode>;
   static const bar_mode_map PRESET_MODES;
diff --git a/src/modules/pulseaudio.cpp b/src/modules/pulseaudio.cpp
index 3efd9d23..255ca571 100644
--- a/src/modules/pulseaudio.cpp
+++ b/src/modules/pulseaudio.cpp
@@ -106,7 +106,7 @@ auto waybar::modules::Pulseaudio::update() -> void {
     }
   } else {
     label_.get_style_context()->remove_class("source-muted");
-    if (config_["format-source-muted"].isString()) {
+    if (config_["format-source"].isString()) {
       format_source = config_["format-source"].asString();
     }
   }