diff --git a/js/ui/status/volume.js b/js/ui/status/volume.js
index fd6c8e7d6..91706343a 100644
--- a/js/ui/status/volume.js
+++ b/js/ui/status/volume.js
@@ -319,7 +319,7 @@ class OutputStreamSlider extends StreamSlider {
         // of different identifiers for headphones, and I could
         // not find the complete list
         if (sink.get_ports().length > 0)
-            return sink.get_port().port.includes('headphone');
+            return sink.get_port().port.toLowerCase().includes('headphone');
 
         return false;
     }