diff --git a/CHANGELOG.md b/CHANGELOG.md
index 030b58a..ef7245d 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+## 4.5.2 (unreleased)
+
+- Fixed error with reindex queue
+
 ## 4.5.1 (2021-08-03)
 
 - Improved performance of reindex queue
diff --git a/lib/searchkick/reindex_queue.rb b/lib/searchkick/reindex_queue.rb
index 22511b9..86a8917 100644
--- a/lib/searchkick/reindex_queue.rb
+++ b/lib/searchkick/reindex_queue.rb
@@ -15,7 +15,7 @@ module Searchkick
     # TODO use reliable queuing
     def reserve(limit: 1000)
       if supports_rpop_with_count?
-        Searchkick.with_redis { |r| r.call("rpop", redis_key, limit) }
+        Searchkick.with_redis { |r| r.call("rpop", redis_key, limit) }.to_a
       else
         record_ids = []
         Searchkick.with_redis do |r|
diff --git a/test/reindex_test.rb b/test/reindex_test.rb
index bd22bb6..7f8f299 100644
--- a/test/reindex_test.rb
+++ b/test/reindex_test.rb
@@ -198,6 +198,9 @@ class ReindexTest < Minitest::Test
     Product.searchkick_index.refresh
     assert_search "product", ["Product A", "Product C"], load: false
     assert_equal 0, reindex_queue.length
+
+    # ensure no error with empty queue
+    Searchkick::ProcessQueueJob.perform_later(class_name: "Product")
   end
 
   def test_transaction
--
libgit2 0.21.0