diff --git a/.gitignore b/.gitignore
index 68d9c3f8e..4045ab4b2 100644
--- a/.gitignore
+++ b/.gitignore
@@ -68,3 +68,5 @@ test/test_run.log
 test/data/ontology_files/catalog-v001.xml
 
 create_permissions.log
+
+ontologies_api.iml
diff --git a/controllers/mappings_controller.rb b/controllers/mappings_controller.rb
index 29e26483a..ed071e2b7 100644
--- a/controllers/mappings_controller.rb
+++ b/controllers/mappings_controller.rb
@@ -35,6 +35,8 @@ class MappingsController < ApplicationController
     reply mappings
   end
 
+
+
   namespace "/mappings" do
     # Display all mappings
     get do
@@ -76,16 +78,7 @@ class MappingsController < ApplicationController
 
     # Display a single mapping - only rest
     get '/:mapping' do
-      mapping_id = nil
-      if params[:mapping] and params[:mapping].start_with?("http")
-        mapping_id = params[:mapping]
-        mapping_id = mapping_id.gsub("/mappings/","/rest_backup_mappings/")
-        mapping_id = RDF::URI.new(params[:mapping])
-      else
-        mapping_id =
-          "http://data.bioontology.org/rest_backup_mappings/#{mapping_id}"
-        mapping_id = RDF::URI.new(mapping_id)
-      end
+      mapping_id = request_mapping_id
       mapping = LinkedData::Mappings.get_rest_mapping(mapping_id)
       if mapping
         reply populate_mapping_classes([mapping].first)
@@ -147,6 +140,20 @@ class MappingsController < ApplicationController
       reply(201, mapping)
     end
 
+
+    patch '/:mapping' do
+      mapping = LinkedData::Mappings.get_rest_mapping(request_mapping_id)
+      process = mapping.process
+      populate_from_params(process, params)
+      if process.valid?
+        process.save
+      else
+        error 422, process.errors
+      end
+      halt 204
+    end
+
+
     # Delete a mapping
     delete '/:mapping' do
       mapping_id = RDF::URI.new(replace_url_prefix(params[:mapping]))
diff --git a/helpers/mappings_helper.rb b/helpers/mappings_helper.rb
index e65a98d38..246fbcdba 100644
--- a/helpers/mappings_helper.rb
+++ b/helpers/mappings_helper.rb
@@ -33,6 +33,18 @@ def populate_mapping_classes(mappings)
 
         mappings
       end
+
+      def request_mapping_id
+        mapping_id = nil
+        if params[:mapping] and params[:mapping].start_with?("http")
+          mapping_id = RDF::URI.new(params[:mapping])
+        else
+          mapping_id =
+            "http://data.bioontology.org/rest_backup_mappings/#{params[:mapping]}"
+          mapping_id = RDF::URI.new(mapping_id)
+        end
+        mapping_id
+      end
     end
   end
 end