diff --git a/ietf/doc/models.py b/ietf/doc/models.py
index 9275b54101..434096929a 100644
--- a/ietf/doc/models.py
+++ b/ietf/doc/models.py
@@ -649,7 +649,7 @@ def referenced_by(self):
                 source__states__slug="active",
             )
             | models.Q(source__type__slug="rfc")
-        )
+        ).distinct()
     
     def referenced_by_rfcs(self):
         """Get refs to this doc from RFCs"""