The matrix elements of operators transforming as irreducible representations of an unbroken symmetry groupGare governed by the well-known Wigner-Eckart relations. In the case of infinite-dimensional systems, withGspontaneously broken, we prove that the corrections to such relations are provided by symmetry breaking Ward identities, and simply reduce to a tadpole term involving Goldstone bosons. The analysis extends to the case in which an explicit symmetry breaking term is present in the Hamiltonian, with the tadpole term now involving pseudo Goldstone bosons. An explicit example is discussed, illustrating the two cases.