In scenarios involving persistent signal and clutter, where subspaces of clutter and signal of interest may be well characterized, the generalized likelihood ratio test (GLRT), also known as matched subspace detector, exploits only the component of signal that is linearly independent of the clutter subspace. This letter introduces a detector that augments the GLRT in such a situation by incorporating and capitalizing upon an assumption of homogeneous spread of clutter energy across the dimensions of whole clutter subspace. The receiving operator characteristic curves show how the advantage of proposed detector over GLRT with a heuristic weight choice.