diff --git a/lib/arel/nodes/and.rb b/lib/arel/nodes/and.rb
index 0d0fb3ee824c19481a7e596ea4a8f6003deac2f2..62e8ef6f11aad2b39b6f3ae856e465762edd6851 100644
--- a/lib/arel/nodes/and.rb
+++ b/lib/arel/nodes/and.rb
@@ -4,6 +4,7 @@ class And < Arel::Nodes::Node
       attr_reader :children
 
       def initialize children, right = nil
+        super()
         unless Array === children
           warn "(#{caller.first}) AND nodes should be created with a list"
           children = [children, right]
diff --git a/lib/arel/nodes/binary.rb b/lib/arel/nodes/binary.rb
index d55c7a54784b951852fe017bd7870805e292fe76..0e7e281b4b1e599ba67e87fb06efd1f5ad958158 100644
--- a/lib/arel/nodes/binary.rb
+++ b/lib/arel/nodes/binary.rb
@@ -4,6 +4,7 @@ class Binary < Arel::Nodes::Node
       attr_accessor :left, :right
 
       def initialize left, right
+        super()
         @left  = left
         @right = right
       end
diff --git a/lib/arel/nodes/function.rb b/lib/arel/nodes/function.rb
index 90bbf4a77b46a0af6e381b01057729dd06c5c5c8..dcafbbf1f4cf21217e3790784330efa9144f2e78 100644
--- a/lib/arel/nodes/function.rb
+++ b/lib/arel/nodes/function.rb
@@ -7,6 +7,7 @@ class Function < Arel::Nodes::Node
       attr_accessor :expressions, :alias, :distinct
 
       def initialize expr, aliaz = nil
+        super()
         @expressions = expr
         @alias       = aliaz && SqlLiteral.new(aliaz)
         @distinct    = false
diff --git a/lib/arel/nodes/insert_statement.rb b/lib/arel/nodes/insert_statement.rb
index 518160cce4f95bdc207964d3bcb3796ed6b16712..ec8870a1c2b797d707eadc35f775f33063ff49ee 100644
--- a/lib/arel/nodes/insert_statement.rb
+++ b/lib/arel/nodes/insert_statement.rb
@@ -4,6 +4,7 @@ class InsertStatement < Arel::Nodes::Node
       attr_accessor :relation, :columns, :values
 
       def initialize
+        super()
         @relation = nil
         @columns  = []
         @values   = nil
diff --git a/lib/arel/nodes/node.rb b/lib/arel/nodes/node.rb
index 84dcb1cdf521825e2efb1dffa5517aab9439f3f9..f10487ff6baf647bcfa4a43b5231fe64c47906a6 100644
--- a/lib/arel/nodes/node.rb
+++ b/lib/arel/nodes/node.rb
@@ -6,6 +6,9 @@ class Node
       include Arel::FactoryMethods
       include Enumerable
 
+      def initialize
+      end
+
       ###
       # Factory method to create a Nodes::Not node that has the recipient of
       # the caller as a child.
diff --git a/lib/arel/nodes/select_core.rb b/lib/arel/nodes/select_core.rb
index 3b400c768d2003ac6eb195e9b033f152351c0bff..09ae420aa187f673daa2fd0cafb07221ba21c071 100644
--- a/lib/arel/nodes/select_core.rb
+++ b/lib/arel/nodes/select_core.rb
@@ -5,6 +5,7 @@ class SelectCore < Arel::Nodes::Node
       attr_accessor :having, :source, :set_quantifier
 
       def initialize
+        super()
         @source         = JoinSource.new nil
         @top            = nil
 
diff --git a/lib/arel/nodes/select_statement.rb b/lib/arel/nodes/select_statement.rb
index 32bdd7080c8ed8843612e40fe60563727623a75a..830ac27046ac4ef29837711c38909576f6e3e6f1 100644
--- a/lib/arel/nodes/select_statement.rb
+++ b/lib/arel/nodes/select_statement.rb
@@ -5,6 +5,7 @@ class SelectStatement < Arel::Nodes::Node
       attr_accessor :limit, :orders, :lock, :offset, :with
 
       def initialize cores = [SelectCore.new]
+        super()
         @cores          = cores
         @orders         = []
         @limit          = nil
diff --git a/lib/arel/nodes/unary.rb b/lib/arel/nodes/unary.rb
index 42c31267dd543c53d57345d89698f1670f51bef6..3d4a4b014a900453eb4068e1da22fa6272c08712 100644
--- a/lib/arel/nodes/unary.rb
+++ b/lib/arel/nodes/unary.rb
@@ -5,6 +5,7 @@ class Unary < Arel::Nodes::Node
       alias :value :expr
 
       def initialize expr
+        super()
         @expr = expr
       end