gistfile1.txt

diff --git a/lib/facter/util/ec2.rb b/lib/facter/util/ec2.rb
index 197a5c9..90368e9 100644
--- a/lib/facter/util/ec2.rb
+++ b/lib/facter/util/ec2.rb
@@ -40,8 +40,10 @@ module Facter::Util::EC2
       if Facter.value(:kernel) == 'windows'
         arp_command = "arp -a"
         mac_address.gsub!(":","-")
-      else
+      elsif Facter.value(:kernel) == 'linux'
         arp_command = "arp -an"
+      else
+        arp_command = "arp -a"
       end
 
       arp_table = Facter::Util::Resolution.exec(arp_command)