diff --git a/src/DotSwashbuckle.AspNetCore.SwaggerGen/SchemaGenerator/ISerializerDataContractResolver.cs b/src/DotSwashbuckle.AspNetCore.SwaggerGen/SchemaGenerator/ISerializerDataContractResolver.cs
index 45d6b52275..250fc1300f 100644
--- a/src/DotSwashbuckle.AspNetCore.SwaggerGen/SchemaGenerator/ISerializerDataContractResolver.cs
+++ b/src/DotSwashbuckle.AspNetCore.SwaggerGen/SchemaGenerator/ISerializerDataContractResolver.cs
@@ -150,8 +150,8 @@ public DataProperty(
         }
 
         public string Name { get; } 
-        public bool IsRequired { get; }
-        public bool IsNullable { get; }
+        public bool IsRequired { get; internal set; }
+        public bool IsNullable { get; internal set; }
         public bool IsReadOnly { get; }
         public bool IsWriteOnly { get; }
         public Type MemberType { get; }
diff --git a/src/DotSwashbuckle.AspNetCore.SwaggerGen/SchemaGenerator/SchemaGenerator.cs b/src/DotSwashbuckle.AspNetCore.SwaggerGen/SchemaGenerator/SchemaGenerator.cs
index 2301fe5376..05947caf56 100644
--- a/src/DotSwashbuckle.AspNetCore.SwaggerGen/SchemaGenerator/SchemaGenerator.cs
+++ b/src/DotSwashbuckle.AspNetCore.SwaggerGen/SchemaGenerator/SchemaGenerator.cs
@@ -70,9 +70,22 @@ private OpenApiSchema GenerateSchemaForMember(
                 {
                     var requiredAttribute = customAttributes.OfType<RequiredAttribute>().FirstOrDefault();
                     var hasRequiredMemberAttribute = customAttributes.OfType<RequiredMemberAttribute>().Any();
-                    schema.Nullable = _generatorOptions.SupportNonNullableReferenceTypes
-                        ? dataProperty.IsNullable && requiredAttribute == null && !hasRequiredMemberAttribute && !memberInfo.IsNonNullableReferenceType()
-                        : dataProperty.IsNullable && requiredAttribute == null && !hasRequiredMemberAttribute;
+
+                    if (_generatorOptions.SupportNonNullableReferenceTypes)
+                    {
+                        schema.Nullable = dataProperty.IsNullable && requiredAttribute == null &&
+                                          !hasRequiredMemberAttribute && !memberInfo.IsNonNullableReferenceType();
+                        if (!schema.Nullable)
+                        {
+                            dataProperty.IsNullable = false;
+                            dataProperty.IsRequired = true;
+                        }
+                    }
+                    else
+                    {
+                        schema.Nullable = dataProperty.IsNullable && requiredAttribute == null &&
+                                          !hasRequiredMemberAttribute;
+                    }
 
                     schema.ReadOnly = dataProperty.IsReadOnly;
                     schema.WriteOnly = dataProperty.IsWriteOnly;
diff --git a/test/DotSwashbuckle.AspNetCore.SwaggerGen.Test/DotSwashbuckle.AspNetCore.SwaggerGen.Test.csproj b/test/DotSwashbuckle.AspNetCore.SwaggerGen.Test/DotSwashbuckle.AspNetCore.SwaggerGen.Test.csproj
index a6a31c7b26..f087e96628 100644
--- a/test/DotSwashbuckle.AspNetCore.SwaggerGen.Test/DotSwashbuckle.AspNetCore.SwaggerGen.Test.csproj
+++ b/test/DotSwashbuckle.AspNetCore.SwaggerGen.Test/DotSwashbuckle.AspNetCore.SwaggerGen.Test.csproj
@@ -10,6 +10,7 @@
     <IsUnitTestProject>true</IsUnitTestProject>
     <IsTestProject>true</IsTestProject>
     <DefineTrace>true</DefineTrace>
+    <Nullable>enable</Nullable>
   </PropertyGroup>
 
   <ItemGroup>
diff --git a/test/DotSwashbuckle.AspNetCore.SwaggerGen.Test/Fixtures/RecordsWithNullableAndRequiredParams.cs b/test/DotSwashbuckle.AspNetCore.SwaggerGen.Test/Fixtures/RecordsWithNullableAndRequiredParams.cs
new file mode 100644
index 0000000000..bbcd1428c8
--- /dev/null
+++ b/test/DotSwashbuckle.AspNetCore.SwaggerGen.Test/Fixtures/RecordsWithNullableAndRequiredParams.cs
@@ -0,0 +1,67 @@
+namespace DotSwashbuckle.AspNetCore.SwaggerGen.Test.Fixtures
+{
+    public sealed class TestClass
+    {
+        public TestClass(string requiredString, string optionalString)
+        {
+            RequiredString = requiredString;
+            OptionalString = optionalString;
+        }
+
+        public string RequiredString { get; }
+        public string? OptionalString { get; }
+    }
+
+    public sealed record TestRecordPrimary(string RequiredString, string? OptionalString);
+    public sealed record TestRecordPrimaryInverse(string? OptionalString, string RequiredString);
+
+    public sealed record TestValueRecordPrimary(int RequiredString, int? OptionalString);
+    public sealed record TestValueRecordPrimaryInverse(int? OptionalString, int RequiredString);
+
+    public sealed record TestRecord
+    {
+        public TestRecord(string requiredString, string? optionalString)
+        {
+            RequiredString = requiredString;
+            OptionalString = optionalString;
+        }
+
+        public string RequiredString { get; }
+
+        public string? OptionalString { get; }
+    }
+
+    public sealed record TestRecordInitOptional
+    {
+        public TestRecordInitOptional(string? optionalString)
+        {
+            OptionalString = optionalString;
+        }
+
+        public string RequiredString { get; set; } = string.Empty;
+
+        public string? OptionalString { get; }
+    }
+
+    public sealed record TestRecordInitRequired
+    {
+        public TestRecordInitRequired(string requiredString)
+        {
+            RequiredString = requiredString;
+        }
+
+        public string RequiredString { get; }
+
+        public string? OptionalString { get; set; }
+    }
+
+    public sealed record TestRecordMixed(string RequiredString)
+    {
+        public string? OptionalString { get; }
+    }
+
+    public sealed record TestRecordMixedSwapped(string? OptionalString)
+    {
+        public string RequiredString { get; set; } = string.Empty;
+    }
+}
diff --git a/test/DotSwashbuckle.AspNetCore.SwaggerGen.Test/SchemaGenerator/JsonSerializerSchemaGeneratorTests.cs b/test/DotSwashbuckle.AspNetCore.SwaggerGen.Test/SchemaGenerator/JsonSerializerSchemaGeneratorTests.cs
index b31fff4a74..c622453717 100644
--- a/test/DotSwashbuckle.AspNetCore.SwaggerGen.Test/SchemaGenerator/JsonSerializerSchemaGeneratorTests.cs
+++ b/test/DotSwashbuckle.AspNetCore.SwaggerGen.Test/SchemaGenerator/JsonSerializerSchemaGeneratorTests.cs
@@ -6,6 +6,7 @@
 using System.Text.Json;
 using System.Text.Json.Serialization;
 using System.Net;
+using DotSwashbuckle.AspNetCore.SwaggerGen.Test.Fixtures;
 using Microsoft.AspNetCore.Http;
 using Microsoft.AspNetCore.Mvc;
 using Microsoft.AspNetCore.Mvc.ApiExplorer;
@@ -81,6 +82,47 @@ public void GenerateSchema_GeneratesPrimitiveSchema_IfPrimitiveOrNullablePrimiti
             Assert.Equal(expectedFormat, schema.Format);
         }
 
+        [Theory]
+        [InlineData(typeof(TestRecordMixedSwapped), nameof(TestRecordMixedSwapped.RequiredString), false, true)]
+        [InlineData(typeof(TestRecordMixedSwapped), nameof(TestRecordMixedSwapped.OptionalString), true, false)]
+        [InlineData(typeof(TestClass), nameof(TestClass.RequiredString), false, true)]
+        [InlineData(typeof(TestClass), nameof(TestClass.OptionalString), true, false)]
+        [InlineData(typeof(TestRecord), nameof(TestRecord.RequiredString), false, true)]
+        [InlineData(typeof(TestRecord), nameof(TestRecord.OptionalString), true, false)]
+        [InlineData(typeof(TestRecordMixed), nameof(TestRecordMixed.RequiredString), false, true)]
+        [InlineData(typeof(TestRecordMixed), nameof(TestRecordMixed.OptionalString), true, false)]
+        [InlineData(typeof(TestRecordInitOptional), nameof(TestRecordInitOptional.RequiredString), false, true)]
+        [InlineData(typeof(TestRecordInitOptional), nameof(TestRecordInitOptional.OptionalString), true, false)]
+        [InlineData(typeof(TestRecordInitRequired), nameof(TestRecordInitRequired.RequiredString), false, true)]
+        [InlineData(typeof(TestRecordInitRequired), nameof(TestRecordInitRequired.OptionalString), true, false)]
+        [InlineData(typeof(TestRecordPrimary), nameof(TestRecordPrimary.RequiredString), false, true)]
+        [InlineData(typeof(TestRecordPrimary), nameof(TestRecordPrimary.OptionalString), true, false)]
+        [InlineData(typeof(TestRecordPrimaryInverse), nameof(TestRecordPrimaryInverse.RequiredString), false, true)]
+        [InlineData(typeof(TestRecordPrimaryInverse), nameof(TestRecordPrimaryInverse.OptionalString), true, false)]
+        [InlineData(typeof(TestValueRecordPrimary), nameof(TestValueRecordPrimary.RequiredString), false, true)]
+        [InlineData(typeof(TestValueRecordPrimary), nameof(TestValueRecordPrimary.OptionalString), true, false)]
+        [InlineData(typeof(TestValueRecordPrimaryInverse), nameof(TestValueRecordPrimaryInverse.RequiredString), false, true)]
+        [InlineData(typeof(TestValueRecordPrimaryInverse), nameof(TestValueRecordPrimaryInverse.OptionalString), true, false)]
+        public void TestNullable_And_Required_When_SupportNonNullableReferenceTypes_Enabled(
+            Type type,
+            string propertyName,
+            bool expectedNullable,
+            bool expectedRequired
+        )
+        {
+            var schemaRepository = new SchemaRepository();
+
+            var referenceSchema = Subject(
+                configureGenerator: c => c.SupportNonNullableReferenceTypes = true
+            ).GenerateSchema(type, schemaRepository);
+
+            Assert.NotNull(referenceSchema.Reference);
+            var schema = schemaRepository.Schemas[referenceSchema.Reference.Id];
+            schema.Properties.TryGetValue(propertyName, out var propertySchema);
+            Assert.Equal(expectedNullable, propertySchema.Nullable);
+            Assert.Equal(expectedRequired, schema.Required.Contains(propertyName));
+        }
+
         [Theory]
         [InlineData(typeof(IntEnum), "integer", "int32", "2", "4", "8")]
         [InlineData(typeof(LongEnum), "integer", "int64", "2", "4", "8")]