Fixed #95 -- Compare values instead of identities

@@ -6,7 +6,11 @@ History
 Pending
 -------
 
-* New release notes here
+1.7.3 (unreleased)
+------------------
+
+* Fixed a regression which prevented the ``Comment`` model
+  from registering with the admin.
 
 1.7.2 (2016-08-04)
 ------------------

@@ -90,5 +90,5 @@ class CommentsAdmin(admin.ModelAdmin):
 # Only register the default admin if the model is the built-in comment model
 # (this won't be true if there's a custom comment app).
 Klass = get_model()
-if Klass._meta.app_label is "django_comments":
+if Klass._meta.app_label == "django_comments":
     admin.site.register(Klass, CommentsAdmin)