2 files changed, 2 insertions, 2 deletions
diff --git a/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb b/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb
index cba00dc625..ae5ae16dc7 100644
--- a/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/mysql2_adapter.rb
@@ -593,7 +593,7 @@ module ActiveRecord
 
           update.where update.key.in(subselect)
         else
-          update.table select.ast.cores.last.source
+          update.table select.source
           update.wheres = select.constraints
         end
       end
diff --git a/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb b/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb
index c3a066a622..a44ac08ce4 100644
--- a/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb
+++ b/activerecord/lib/active_record/connection_adapters/mysql_adapter.rb
@@ -507,7 +507,7 @@ module ActiveRecord
 
           update.where update.key.in(subselect)
         else
-          update.table select.ast.cores.last.source
+          update.table select.source
           update.wheres = select.constraints
         end
       end