diff --git a/lib/plugins/acts_as_versioned/lib/acts_as_versioned.rb b/lib/plugins/acts_as_versioned/lib/acts_as_versioned.rb
index 7510462bd0c..9648a80cb51 100644
--- a/lib/plugins/acts_as_versioned/lib/acts_as_versioned.rb
+++ b/lib/plugins/acts_as_versioned/lib/acts_as_versioned.rb
@@ -435,7 +435,7 @@ def set_new_version
           # Gets the next available version for the current record, or 1 for a new record
           def next_version
             return 1 if new_record?
-            (versions.calculate(:max, :version) || 0) + 1
+            (versions.maximum(:version) || 0) + 1
           end
 
           # clears current changed attributes.  Called after save.