diff --git a/lib/galaxy/webapps/tool_shed/api/repository_revisions.py b/lib/galaxy/webapps/tool_shed/api/repository_revisions.py
index 6f6a8f1ea13..6841f627edb 100644
--- a/lib/galaxy/webapps/tool_shed/api/repository_revisions.py
+++ b/lib/galaxy/webapps/tool_shed/api/repository_revisions.py
@@ -133,7 +133,7 @@ class RepositoryRevisionsController( BaseAPIController ):
             trans.response.status = 500
             return message
 
-    @web.expose_api
+    @web.expose_api_anonymous
     def show( self, trans, id, **kwd ):
         """
         GET /api/repository_revisions/{encoded_repository_metadata_id}