diff --git a/activerecord/lib/active_record/relation/query_methods.rb b/activerecord/lib/active_record/relation/query_methods.rb
index e71f1cca72eb766238a8e3d9b90d2adfd1ceb5db..7bf1d81ea2fd381cae42ee4b7b40c9e3fa17233f 100644
--- a/activerecord/lib/active_record/relation/query_methods.rb
+++ b/activerecord/lib/active_record/relation/query_methods.rb
@@ -217,7 +217,7 @@ def build_joins(relation, joins)
     end
 
     def build_select(arel, selects)
-      if selects.present?
+      unless selects.empty?
         @implicit_readonly = false
         # TODO: fix this ugly hack, we should refactor the callers to get an ARel compatible array.
         # Before this change we were passing to ARel the last element only, and ARel is capable of handling an array