diff --git a/lib/arel/nodes/node.rb b/lib/arel/nodes/node.rb
index 4faace37..84dcb1cd 100644
--- a/lib/arel/nodes/node.rb
+++ b/lib/arel/nodes/node.rb
@@ -39,7 +39,7 @@ def to_sql engine = Table.engine
       def each &block
         return enum_for(:each) unless block_given?
 
-        Visitors::DepthFirst.new(block).accept self
+        ::Arel::Visitors::DepthFirst.new(block).accept self
       end
     end
   end