diff --git a/lib/refrepo/gen/oar-properties.rb b/lib/refrepo/gen/oar-properties.rb
index 71a93b42b98c9e3587342c5b8be5fe61caaf4e5e..85b98ba1eb2b9674faa4b11495c84f846c3db73c 100644
--- a/lib/refrepo/gen/oar-properties.rb
+++ b/lib/refrepo/gen/oar-properties.rb
@@ -99,7 +99,7 @@ def get_ref_node_properties_internal(cluster_uid, cluster, node_uid, node)
   h['ib'] = ib_map[h['ib_rate']]
 
   puts "#{node_uid}: Warning - no rate info for the ib interface" if h['ib_count'] > 0 && h['ib_rate'] == 0
-  
+
   # OMNIPATH
   ni_mountable = node['network_adapters'].select { |na| /^ib[0-9]*(\.[0-9]*)?$/.match(na['device']) && (na['interface'] == 'Omni-Path' and na['enabled'] == true && (na['mounted'] == true || na['mountable'] == true)) }
   ni_fastest   = ni_mountable.max_by { |na| na['rate'] || 0 }
@@ -351,10 +351,10 @@ def diff_properties(type, properties_oar, properties_ref)
     properties_ref.delete('state')
   elsif type == 'default' && properties_ref.size == 1
     # For dead nodes, when information is missing from the reference-repo, only enforce the 'state' property and ignore other differences.
-    return HashDiff.diff({'state' => properties_oar['state']}, {'state' => properties_ref['state']})
+    return Hashdiff.diff({'state' => properties_oar['state']}, {'state' => properties_ref['state']})
   end
 
-  return HashDiff.diff(properties_oar, properties_ref)
+  return Hashdiff.diff(properties_oar, properties_ref)
 end
 
 # These keys will not be created neither compared with the -d option
@@ -552,7 +552,7 @@ def ssh_exec(cmds, options, site_uid)
       end
 
       cmds.each { |cmd|
-        channel.send_data cmd 
+        channel.send_data cmd
       }
       channel.eof!
     }
@@ -698,7 +698,7 @@ def generate_oar_properties(options)
         end
       end
 
-      # Get the list of property keys from the OAR scheduler (['oar'])   
+      # Get the list of property keys from the OAR scheduler (['oar'])
       properties_keys['oar'][site_uid] = get_property_keys(properties['oar'][site_uid])
 
       # Build the list of properties that must be created in the OAR server
diff --git a/lib/refrepo/valid/homogeneity.rb b/lib/refrepo/valid/homogeneity.rb
index a226ca30e4f5cee3244e55bdfee7a94798e1f58b..0dc97b9e06d6443193517d8424ecea30b5b8607c 100644
--- a/lib/refrepo/valid/homogeneity.rb
+++ b/lib/refrepo/valid/homogeneity.rb
@@ -193,7 +193,7 @@ def cluster_homogeneity(refapi_hash, options = {:verbose => false})
           next
         end
 
-        diffs = HashDiff.diff(refnode, node)
+        diffs = Hashdiff.diff(refnode, node)
 
         # Hack HashDiff output for arrays:
         #[["-", "pdu[1]", {"uid"=>"graphene-pdu9", "port"=>24}],