Yes, but with only 3-4" and the fact you are probably only going to have it there for 5-7 days it should not be a concern. If you were, say going to leave it for 2-3 months it would be a concern.
BTW, are you dry hopping it? If not, do some reading on actually using a secondary. While many instructions tell you to do this the general consensus these days unless you are adding fruit, spices or oaking there is no need to go secondary, just extend the primary time by a week or two.