diff --git a/src/display-buffer.coffee b/src/display-buffer.coffee
index 8e1aa8a19..a2c9817a3 100644
--- a/src/display-buffer.coffee
+++ b/src/display-buffer.coffee
@@ -148,8 +148,8 @@ class DisplayBuffer extends Model
         Grim.deprecate("Use Decoration::onDidCreateMarker instead")
       when 'markers-updated'
         Grim.deprecate("Use Decoration::onDidUpdateMarkers instead")
-      # else
-      #   Grim.deprecate("DisplayBuffer::on is deprecated. Use event subscription methods instead.")
+      else
+        Grim.deprecate("DisplayBuffer::on is deprecated. Use event subscription methods instead.")
 
     EmitterMixin::on.apply(this, arguments)