1 files changed, 4 insertions, 3 deletions
diff --git a/lib/api/merge_request_diffs.rb b/lib/api/merge_request_diffs.rb
index a59e39cca26..4b79eac2b8b 100644
--- a/lib/api/merge_request_diffs.rb
+++ b/lib/api/merge_request_diffs.rb
@@ -5,14 +5,16 @@ module API
 
     before { authenticate! }
 
-    resource :projects do
+    params do
+      requires :id, type: String, desc: 'The ID of a project'
+    end
+    resource :projects, requirements: { id: %r{[^/]+} } do
       desc 'Get a list of merge request diff versions' do
         detail 'This feature was introduced in GitLab 8.12.'
         success Entities::MergeRequestDiff
       end
 
       params do
-        requires :id, type: String, desc: 'The ID of a project'
         requires :merge_request_iid, type: Integer, desc: 'The IID of a merge request'
         use :pagination
       end
@@ -28,7 +30,6 @@ module API
       end
 
       params do
-        requires :id, type: String, desc: 'The ID of a project'
         requires :merge_request_iid, type: Integer, desc: 'The IID of a merge request'
         requires :version_id, type: Integer, desc: 'The ID of a merge request diff version'
       end