Corners of Cuntz-Krieger algebras

We show that if $A$ is a unital $C^{\ast }$-algebra and $B$ is a Cuntz-Krieger algebra for which $A\otimes \mathbb{K}\cong B\otimes \mathbb{K}$, then $A$ is a Cuntz-Krieger algebra. Consequently, corners of Cuntz-Krieger algebras are Cuntz-Krieger algebras.