diff --git a/hash.rb b/hash.rb
index 7e63d43..f0c01d4 100644
--- a/hash.rb
+++ b/hash.rb
@@ -19,6 +19,8 @@ module Puppet::Parser::Functions
     result = {}
 
     begin
+      # This is to make it compatible with older version of Ruby ...
+      array  = array.flatten
       result = Hash[*array]
     rescue Exception
       raise(Puppet::ParseError, 'hash(): Unable to compute ' +