Moq and methods with dynamic arguments

Question

Possible Duplicate:
How to mock a method call that takes a dynamic object

I have a method with dynamic argument:

public void SampleMethod(dynamic arg) 
{ 
Console.WriteLine(arg.dynamicProperty);
}

Also I have a Moq mock for the class that contains this method. I need to verify that SampleMethod was called so I tried the following code

_dynClassMock.Verify(x => x.SampleMethod(It.IsAny<dynamic>()), Times.Once);

but it doesn't work. I've the following compile time error:

An expression tree may not contain a dynamic operation

Is there any workaround for this issue?