diff --git a/lib/arel/nodes/node.rb b/lib/arel/nodes/node.rb
index f10487ff6baf647bcfa4a43b5231fe64c47906a6..36e762861255c7603c2257f424112be5a6364bd5 100644
--- a/lib/arel/nodes/node.rb
+++ b/lib/arel/nodes/node.rb
@@ -6,7 +6,14 @@ class Node
       include Arel::FactoryMethods
       include Enumerable
 
-      def initialize
+      if $DEBUG
+        def _caller
+          @caller
+        end
+
+        def initialize
+          @caller = caller.dup
+        end
       end
 
       ###