diff --git a/app/controllers/concerns/blacklight/bookmarks.rb b/app/controllers/concerns/blacklight/bookmarks.rb
index ae99c7e81..bc784be71 100644
--- a/app/controllers/concerns/blacklight/bookmarks.rb
+++ b/app/controllers/concerns/blacklight/bookmarks.rb
@@ -27,7 +27,7 @@ module Blacklight::Bookmarks
   def action_documents
     bookmarks = token_or_current_or_guest_user.bookmarks
     bookmark_ids = bookmarks.collect { |b| b.document_id.to_s }
-    search_service.fetch(bookmark_ids, rows: bookmark_ids.count)
+    search_service.fetch(bookmark_ids)
   end
 
   def action_success_redirect_path
diff --git a/app/services/blacklight/search_service.rb b/app/services/blacklight/search_service.rb
index 4c0a234de..0d0140139 100644
--- a/app/services/blacklight/search_service.rb
+++ b/app/services/blacklight/search_service.rb
@@ -152,11 +152,20 @@ def previous_and_next_document_params(*, **)
     def fetch_many(ids, extra_controller_params)
       extra_controller_params ||= {}
 
+      requested_rows = extra_controller_params.delete(:rows)
+      if requested_rows
+        Blacklight.deprecation.warn("Passing :rows to fetch_many is deprecated. Create an issue in blacklight if you see this warning. " \
+                                    "Otherwise, :rows will be ignored in Blackight 10")
+      else
+        requested_rows = ids.count
+      end
+
       query = search_builder
               .with(search_state)
               .where(blacklight_config.document_model.unique_key => ids)
               .merge(blacklight_config.fetch_many_document_params)
               .merge(extra_controller_params)
+      query.rows(requested_rows)
 
       # find_many was introduced in Blacklight 8.4. Before that, we used the
       # regular search method (possibly with a find-many specific `qt` parameter).