diff --git a/common/lib/xmodule/setup.py b/common/lib/xmodule/setup.py
index 29227c3188449734307e47ce28f783ea415c1a6e..06df6b112343e8d6b9559b9c4f3b595e9dfe5e9c 100644
--- a/common/lib/xmodule/setup.py
+++ b/common/lib/xmodule/setup.py
@@ -26,6 +26,7 @@ setup(
             "html = xmodule.html_module:HtmlDescriptor",
             "image = xmodule.backcompat_module:TranslateCustomTagDescriptor",
             "error = xmodule.error_module:ErrorDescriptor",
+            "peergrading = xmodule.peer_grading_module:PeerGradingDescriptor",
             "problem = xmodule.capa_module:CapaDescriptor",
             "problemset = xmodule.seq_module:SequenceDescriptor",
             "section = xmodule.backcompat_module:SemanticSectionDescriptor",