diff --git a/src/StubGenerator.Test.Models/EnTestEnum.cs b/src/StubGenerator.Test.Models/EnTestEnum.cs
new file mode 100644
index 0000000..28ba329
--- /dev/null
+++ b/src/StubGenerator.Test.Models/EnTestEnum.cs
@@ -0,0 +1,9 @@
+namespace StubGenerator.Test.Models
+{
+    public enum EnTestEnum
+    {
+        Option1,
+        Option2,
+        Option3
+    }
+}
diff --git a/src/StubGenerator.Test.Models/ModelWithComplexTypeProperty.cs b/src/StubGenerator.Test.Models/ModelWithComplexTypeProperty.cs
index 54a921a..baba616 100644
--- a/src/StubGenerator.Test.Models/ModelWithComplexTypeProperty.cs
+++ b/src/StubGenerator.Test.Models/ModelWithComplexTypeProperty.cs
@@ -18,6 +18,10 @@ public class ModelWithComplexTypeProperty
 
         public InnerComplexType ComplexType { get; set; }
 
+        public ModelConstructorHasParameters ModelConstructorHasParameters { get; set; }
+
+        public ModelConstructorMixed ModelConstructorMixed { get; set; }
+
         public List<InnerComplexType> CollectionTypeComplex { get; set; }
     }
 
@@ -42,10 +46,29 @@ public class InnerComplexType
         public Nullable<int> NullableIntegerProperty2 { get; set; }
     }
 
-    public enum EnTestEnum
+
+    public class ModelConstructorHasParameters
+    {
+        public ModelConstructorHasParameters(int intField)
+        {
+            IntField = intField;
+        }
+
+        public int IntField { get; set; }
+    }
+
+
+    public class ModelConstructorMixed
     {
-        Option1,
-        Option2,
-        Option3
+        public ModelConstructorMixed()
+        {
+        }
+
+        public ModelConstructorMixed(string firstName)
+        {
+            FirstName = firstName;
+        }
+
+        public string FirstName { get; set; }
     }
 }
diff --git a/src/StubGenerator.Test/StubManagerTests.cs b/src/StubGenerator.Test/StubManagerTests.cs
index d619aae..d782287 100644
--- a/src/StubGenerator.Test/StubManagerTests.cs
+++ b/src/StubGenerator.Test/StubManagerTests.cs
@@ -146,5 +146,14 @@ public void Should_Set_Given_Values_While_Generating_Data()
             Assert.Equal(givenEnum, generatedStubData.EnumProperty);
             Assert.Equal(givenInteger, generatedStubData.IntegerProperty);
         }
+
+        [Fact(DisplayName = "Should Generate Data For Complex Type Properties Check Parameterless")]
+        public void Should_Generate_Data_For_Complex_Type_Properties_Check_Parameterless()
+        {
+            var generatedStubData = _stubManager.CreateNew<ModelWithComplexTypeProperty>();
+            Assert.NotNull(generatedStubData.ComplexType);
+            Assert.NotNull(generatedStubData.ModelConstructorMixed);
+            Assert.Null(generatedStubData.ModelConstructorHasParameters);
+        }
     }
 }
diff --git a/src/StubMiddleware.Core/Core/StubManager.cs b/src/StubMiddleware.Core/Core/StubManager.cs
index 62c315a..181974e 100644
--- a/src/StubMiddleware.Core/Core/StubManager.cs
+++ b/src/StubMiddleware.Core/Core/StubManager.cs
@@ -13,7 +13,7 @@ public class StubManager : IStubManager
     {
         private readonly IFakeDataFactory _fakeDataFactory;
         private readonly IStubTypeCache _stubTypeCache;
-       
+
         public StubManager(StubManagerOptions stubManagerOptions)
             : this(stubManagerOptions, new MemoryStubTypeCache(), new FakeDataFactory())
         {
@@ -88,9 +88,13 @@ private void FillPropertiesWithFakeData<TObject>(TObject obj, PropertyInfo[] pro
                 {
                     if (!property.PropertyType.IsSimple())
                     {
-                        dynamic innerComplexObj = Activator.CreateInstance(property.PropertyType);
-                        obj.GetType().GetProperty(property.Name).SetValue(obj, innerComplexObj);
-                        FillPropertiesWithFakeData(innerComplexObj, _stubTypeCache.GetOrAdd(innerComplexObj, innerComplexObj.GetType().GetProperties()));
+                        /*check the type has parameterless constructor*/
+                        if ((property.PropertyType.GetConstructor(Type.EmptyTypes) != null))
+                        {
+                            dynamic innerComplexObj = Activator.CreateInstance(property.PropertyType);
+                            obj.GetType().GetProperty(property.Name).SetValue(obj, innerComplexObj);
+                            FillPropertiesWithFakeData(innerComplexObj, _stubTypeCache.GetOrAdd(innerComplexObj, innerComplexObj.GetType().GetProperties()));
+                        }
                     }
                     else
                     {