3 files changed, 3 insertions, 0 deletions
diff --git a/lib/arel/visitors/depth_first.rb b/lib/arel/visitors/depth_first.rb
index 24c435ad1d..2894bea19c 100644
--- a/lib/arel/visitors/depth_first.rb
+++ b/lib/arel/visitors/depth_first.rb
@@ -161,6 +161,7 @@ module Arel
       def visit_Array o
         o.each { |i| visit i }
       end
+      alias :visit_Set :visit_Array
 
       def visit_Hash o
         o.each { |k,v| visit(k); visit(v) }
diff --git a/lib/arel/visitors/dot.rb b/lib/arel/visitors/dot.rb
index 8a83ebf48e..9bf9f88d18 100644
--- a/lib/arel/visitors/dot.rb
+++ b/lib/arel/visitors/dot.rb
@@ -212,6 +212,7 @@ module Arel
           edge(i) { visit x }
         end
       end
+      alias :visit_Set :visit_Array
 
       def visit_edge o, method
         edge(method) { visit o.send(method) }
diff --git a/lib/arel/visitors/to_sql.rb b/lib/arel/visitors/to_sql.rb
index a350daa3da..6dd652a709 100644
--- a/lib/arel/visitors/to_sql.rb
+++ b/lib/arel/visitors/to_sql.rb
@@ -477,6 +477,7 @@ key on UpdateManager using UpdateManager#key=
       def visit_Array o
         o.map { |x| visit x }.join(', ')
       end
+      alias :visit_Set :visit_Array
 
       def quote value, column = nil
         @connection.quote value, column