diff --git a/src/Nancy/ModelBinding/DefaultConverters/FallbackConverter.cs b/src/Nancy/ModelBinding/DefaultConverters/FallbackConverter.cs
index 15bb1001ca..ca126dcd7e 100644
--- a/src/Nancy/ModelBinding/DefaultConverters/FallbackConverter.cs
+++ b/src/Nancy/ModelBinding/DefaultConverters/FallbackConverter.cs
@@ -46,7 +46,7 @@ public object Convert(string input, Type destinationType, BindingContext context
                 {
                     return true;
                 }
-                return null;
+                throw;
             }
         }
     }
diff --git a/test/Nancy.Tests/Unit/ModelBinding/DefaultBinderFixture.cs b/test/Nancy.Tests/Unit/ModelBinding/DefaultBinderFixture.cs
index 16f4bfeed0..7cb05e17b8 100644
--- a/test/Nancy.Tests/Unit/ModelBinding/DefaultBinderFixture.cs
+++ b/test/Nancy.Tests/Unit/ModelBinding/DefaultBinderFixture.cs
@@ -294,25 +294,6 @@ public void Should_call_convert_on_type_converter_if_available()
                 .MustHaveHappened(Repeated.Exactly.Once);
         }
 
-        [Fact]
-        public void Should_ignore_properties_that_cannot_be_converted()
-        {
-            // Given
-            var binder = this.GetBinder(typeConverters: new[] { new FallbackConverter() });
-            var context = new NancyContext { Request = new FakeRequest("GET", "/") };
-            context.Request.Form["StringProperty"] = "Test";
-            context.Request.Form["IntProperty"] = "12";
-            context.Request.Form["DateProperty"] = "Broken";
-
-            // When
-            var result = (TestModel)binder.Bind(context, typeof(TestModel), null, BindingConfig.Default);
-
-            // Then
-            result.StringProperty.ShouldEqual("Test");
-            result.IntProperty.ShouldEqual(12);
-            result.DateProperty.ShouldEqual(default(DateTime));
-        }
-
         [Fact]
         public void Should_throw_ModelBindingException_if_convertion_of_a_property_fails()
         {
@@ -321,6 +302,7 @@ public void Should_throw_ModelBindingException_if_convertion_of_a_property_fails
             var context = new NancyContext { Request = new FakeRequest("GET", "/") };
             context.Request.Form["IntProperty"] = "badint";
             context.Request.Form["AnotherIntProperty"] = "morebad";
+            context.Request.Form["DateProperty"] = "bad dates"; // Indiana Jones' monkey is dead :)
 
             // Then
             Type modelType = typeof(TestModel);
@@ -333,6 +315,9 @@ public void Should_throw_ModelBindingException_if_convertion_of_a_property_fails
                              && exception.PropertyBindingExceptions.Any(pe =>
                                                                         pe.PropertyName == "AnotherIntProperty"
                                                                         && pe.AttemptedValue == "morebad")
+                             && exception.PropertyBindingExceptions.Any(pe =>
+                                                                        pe.PropertyName == "DateProperty"
+                                                                        && pe.AttemptedValue == "bad dates")
                              && exception.PropertyBindingExceptions.All(pe =>
                                                                         pe.InnerException.Message.Contains(pe.AttemptedValue)
                                                                         && pe.InnerException.Message.Contains(modelType.GetProperty(pe.PropertyName).PropertyType.Name)));