  Let $f$ be a cuspidal newform (holomorphic or Maass) of arbitrary level and
nebentypus and denote by $\lambda_f(n)$ its $n$-th Hecke eigenvalue. Let $$
r(n)=\#\left\{(n_1,n_2)\in \mathbb{Z}^2:n_1^2+n_2^2=n\right\}. $$ In this
paper, we study the shifted convolution sum $$ \mathcal{S}_h(X)=\sum_{n\leq
X}\lambda_f(n+h)r(n), \qquad 1\leq h\leq X, $$ and establish uniform bounds
with respect to the shift $h$ for $\mathcal{S}_h(X)$.
