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-rw-r--r--lib/arel/nodes.rb1
1 files changed, 1 insertions, 0 deletions
diff --git a/lib/arel/nodes.rb b/lib/arel/nodes.rb
index bf7ae830d0..24a71c54a2 100644
--- a/lib/arel/nodes.rb
+++ b/lib/arel/nodes.rb
@@ -5,6 +5,7 @@ require 'arel/nodes/and'
require 'arel/nodes/in'
require 'arel/nodes/count'
+require 'arel/nodes/sum'
require 'arel/nodes/sql_literal'
require 'arel/nodes/select_core'
require 'arel/nodes/select_statement'