diff --git a/src/Umbraco.Core/Services/Implement/RelationService.cs b/src/Umbraco.Core/Services/Implement/RelationService.cs
index 4b53709de9..c629466edf 100644
--- a/src/Umbraco.Core/Services/Implement/RelationService.cs
+++ b/src/Umbraco.Core/Services/Implement/RelationService.cs
@@ -15,13 +15,15 @@ namespace Umbraco.Core.Services.Implement
         private readonly IEntityService _entityService;
         private readonly IRelationRepository _relationRepository;
         private readonly IRelationTypeRepository _relationTypeRepository;
+        private readonly IAuditRepository _auditRepository;
 
         public RelationService(IScopeProvider uowProvider, ILogger logger, IEventMessagesFactory eventMessagesFactory, IEntityService entityService,
-            IRelationRepository relationRepository, IRelationTypeRepository relationTypeRepository)
+            IRelationRepository relationRepository, IRelationTypeRepository relationTypeRepository, IAuditRepository auditRepository)
             : base(uowProvider, logger, eventMessagesFactory)
         {
             _relationRepository = relationRepository;
             _relationTypeRepository = relationTypeRepository;
+            _auditRepository = auditRepository;
             _entityService = entityService ?? throw new ArgumentNullException(nameof(entityService));
         }
 
@@ -476,6 +478,7 @@ namespace Umbraco.Core.Services.Implement
                 }
 
                 _relationTypeRepository.Save(relationType);
+                Audit(AuditType.Save, Constants.Security.SuperUserId, relationType.Id, $"Saved relation type: {relationType.Name}");
                 scope.Complete();
                 saveEventArgs.CanCancel = false;
                 scope.Events.Dispatch(SavedRelationType, this, saveEventArgs);
@@ -565,6 +568,11 @@ namespace Umbraco.Core.Services.Implement
             }
             return relations;
         }
+
+        private void Audit(AuditType type, int userId, int objectId, string message = null)
+        {
+            _auditRepository.Save(new AuditItem(objectId, type, userId, ObjectTypes.GetName(UmbracoObjectTypes.RelationType), message));
+        }
         #endregion
 
         #region Events Handlers
diff --git a/src/Umbraco.Tests/TestHelpers/TestObjects.cs b/src/Umbraco.Tests/TestHelpers/TestObjects.cs
index 56ad22d414..0840d8a18c 100644
--- a/src/Umbraco.Tests/TestHelpers/TestObjects.cs
+++ b/src/Umbraco.Tests/TestHelpers/TestObjects.cs
@@ -183,7 +183,7 @@ namespace Umbraco.Tests.TestHelpers
                         compiledPackageXmlParser, Mock.Of<IPackageActionRunner>(),
                         new DirectoryInfo(IOHelper.GetRootDirectorySafe())));
             });
-            var relationService = GetLazyService<IRelationService>(factory, c => new RelationService(scopeProvider, logger, eventMessagesFactory, entityService.Value, GetRepo<IRelationRepository>(c), GetRepo<IRelationTypeRepository>(c)));
+            var relationService = GetLazyService<IRelationService>(factory, c => new RelationService(scopeProvider, logger, eventMessagesFactory, entityService.Value, GetRepo<IRelationRepository>(c), GetRepo<IRelationTypeRepository>(c), GetRepo<IAuditRepository>(c)));
             var tagService = GetLazyService<ITagService>(factory, c => new TagService(scopeProvider, logger, eventMessagesFactory, GetRepo<ITagRepository>(c)));
             var redirectUrlService = GetLazyService<IRedirectUrlService>(factory, c => new RedirectUrlService(scopeProvider, logger, eventMessagesFactory, GetRepo<IRedirectUrlRepository>(c)));
             var consentService = GetLazyService<IConsentService>(factory, c => new ConsentService(scopeProvider, logger, eventMessagesFactory, GetRepo<IConsentRepository>(c)));