diff --git a/src/onedb/local/5.7.80_to_5.8.0.rb b/src/onedb/local/5.7.80_to_5.8.0.rb
index 6c15e815ab..24ef386675 100644
--- a/src/onedb/local/5.7.80_to_5.8.0.rb
+++ b/src/onedb/local/5.7.80_to_5.8.0.rb
@@ -14,7 +14,6 @@
 # limitations under the License.                                             #
 #--------------------------------------------------------------------------- #
 
-
 require 'set'
 require 'base64'
 require 'zlib'
@@ -22,20 +21,23 @@ require 'pathname'
 require 'yaml'
 require 'opennebula'
 
-$: << File.dirname(__FILE__)
-
-include OpenNebula
+$LOAD_PATH << File.dirname(__FILE__)
 
+# OpenNebula DB migrator to 5.8
 module Migrator
+
+    include OpenNebula
+
     def db_version
-        "5.8.0"
+        '5.8.0'
     end
 
     def one_version
-        "OpenNebula 5.8.0"
+        'OpenNebula 5.8.0'
     end
 
     def up
-        return true
+        true
     end
+
 end