diff --git a/backend/src/Squidex.Infrastructure/Reflection/SimpleEquals.cs b/backend/src/Squidex.Infrastructure/Reflection/SimpleEquals.cs
index 63d928b21..b04cf7708 100644
--- a/backend/src/Squidex.Infrastructure/Reflection/SimpleEquals.cs
+++ b/backend/src/Squidex.Infrastructure/Reflection/SimpleEquals.cs
@@ -18,9 +18,16 @@ namespace Squidex.Infrastructure.Reflection
     public static class SimpleEquals
     {
         private static readonly ConcurrentDictionary<Type, IDeepComparer> Comparers = new ConcurrentDictionary<Type, IDeepComparer>();
+        private static readonly HashSet<Type> SimpleTypes = new HashSet<Type>();
         private static readonly DefaultComparer DefaultComparer = new DefaultComparer();
         private static readonly NoopComparer NoopComparer = new NoopComparer();
 
+        static SimpleEquals()
+        {
+            SimpleTypes.Add(typeof(string));
+            SimpleTypes.Add(typeof(Uri));
+        }
+
         internal static IDeepComparer Build(Type type)
         {
             return BuildCore(type) ?? DefaultComparer;
@@ -91,7 +98,7 @@ namespace Squidex.Infrastructure.Reflection
 
         private static bool IsSimpleType(Type type)
         {
-            return type.IsValueType || type == typeof(string);
+            return type.IsValueType || SimpleTypes.Contains(type);
         }
 
         private static bool IsEquatable(Type type)
diff --git a/backend/tests/Squidex.Infrastructure.Tests/Reflection/SimpleEqualsTests.cs b/backend/tests/Squidex.Infrastructure.Tests/Reflection/SimpleEqualsTests.cs
index fab1d637d..ef155d05e 100644
--- a/backend/tests/Squidex.Infrastructure.Tests/Reflection/SimpleEqualsTests.cs
+++ b/backend/tests/Squidex.Infrastructure.Tests/Reflection/SimpleEqualsTests.cs
@@ -84,6 +84,12 @@ namespace Squidex.Infrastructure.Reflection
                 TimeSpan.FromMilliseconds(123),
                 TimeSpan.FromMilliseconds(55)
             };
+
+            yield return new object[]
+            {
+                new Uri("/url1", UriKind.Relative),
+                new Uri("/url2", UriKind.Relative),
+            };
         }
 
         [Theory]