diff --git citations-impl/impl/src/java/org/sakaiproject/citation/impl/BaseCitationService.java citations-impl/impl/src/java/org/sakaiproject/citation/impl/BaseCitationService.java
index 471842e..d5f320d 100644
--- citations-impl/impl/src/java/org/sakaiproject/citation/impl/BaseCitationService.java
+++ citations-impl/impl/src/java/org/sakaiproject/citation/impl/BaseCitationService.java
@@ -4499,10 +4499,9 @@ public abstract class BaseCitationService implements CitationService
 	public Collection getEntityAuthzGroups(Reference ref, String userId)
 	{
 		// entities that are actually in /content use the /content authz groups
-
-		// those in /citation are open?
-
-		return null;
+		String id = ref.getId();
+		Reference contentRef = m_entityManager.newReference(ContentHostingService.REFERENCE_ROOT + id);
+		return m_contentHostingService.getEntityAuthzGroups(contentRef, userId);
 	}
 
 	/*