diff --git a/lib/facter/mysql_server_id.rb b/lib/facter/mysql_server_id.rb
index df0052f..3cb39e5 100644
--- a/lib/facter/mysql_server_id.rb
+++ b/lib/facter/mysql_server_id.rb
@@ -1,5 +1,5 @@
 def get_mysql_id
-  Facter.value(:macaddress).split(':').inject(0) { |total,value| (total << 6) + value.hex }
+  Facter.value(:macaddress).split(':')[2..-1].inject(0) { |total,value| (total << 6) + value.hex }
 end
 
 Facter.add("mysql_server_id") do
diff --git a/spec/unit/facter/mysql_server_id_spec.rb b/spec/unit/facter/mysql_server_id_spec.rb
index e82a2bc..a2e9fdf 100644
--- a/spec/unit/facter/mysql_server_id_spec.rb
+++ b/spec/unit/facter/mysql_server_id_spec.rb
@@ -11,7 +11,7 @@ describe Facter::Util::Fact do
         Facter.fact(:macaddress).stubs(:value).returns('3c:97:0e:69:fb:e1')
       end
       it do
-        Facter.fact(:mysql_server_id).value.to_s.should == '66961985441'
+        Facter.fact(:mysql_server_id).value.to_s.should == '4116385'
       end
     end