diff --git a/r2/r2/controllers/listingcontroller.py b/r2/r2/controllers/listingcontroller.py
index 790396f9d..77e5e980d 100644
--- a/r2/r2/controllers/listingcontroller.py
+++ b/r2/r2/controllers/listingcontroller.py
@@ -593,7 +593,12 @@ class AdsController(SubredditListingController):
 
     def keep_fn(self):
         def keep(item):
-            return item.promoted and not item._deleted
+            if item._fullname in self.promos:
+                return False
+            if item.promoted and not item._deleted:
+                self.promos.add(item._fullname)
+                return True
+            return False
         return keep
 
     def query(self):
@@ -607,6 +612,10 @@ class AdsController(SubredditListingController):
         promote.add_trackers(listing.things, c.site)
         return listing
 
+    def GET_listing(self, *a, **kw):
+        self.promos = set()
+        return SubredditListingController.GET_listing(self, *a, **kw)
+
 
 class RandomrisingController(ListingWithPromos):
     where = 'randomrising'