1 files changed, 4 insertions, 5 deletions
diff --git a/lib/arel/expressions.rb b/lib/arel/expressions.rb
index d40268c292..fa18f15b67 100644
--- a/lib/arel/expressions.rb
+++ b/lib/arel/expressions.rb
@@ -5,24 +5,23 @@ module Arel
     end
 
     def sum
-      Nodes::Sum.new [self]
+      Nodes::Sum.new [self], Nodes::SqlLiteral.new('sum_id')
     end
 
     def maximum
-      Nodes::Max.new [self]
+      Nodes::Max.new [self], Nodes::SqlLiteral.new('max_id')
     end
 
     def minimum
-      Nodes::Min.new [self]
+      Nodes::Min.new [self], Nodes::SqlLiteral.new('min_id')
     end
 
     def average
-      Nodes::Avg.new [self]
+      Nodes::Avg.new [self], Nodes::SqlLiteral.new('avg_id')
     end
 
     def extract field
       Nodes::Extract.new [self], field
     end
-
   end
 end