diff --git a/src/correlation.jl b/src/correlation.jl
index 79dab3c2..72d032d1 100644
--- a/src/correlation.jl
+++ b/src/correlation.jl
@@ -206,7 +206,6 @@ function Spectrum(c::CorrelationFunction, ps=[]; w=Parameter(:ω), kwargs...)
     lhs = getfield.(de.equations, :lhs)
     rhs = getfield.(de.equations, :rhs)
     lhs0 = getfield.(de0.equations, :lhs)
-    ps_ = _unpack_parameters(ps)
     A,b,c_,Afunc,bfunc,cfunc = _build_spec_func(w, lhs, rhs, c.op2_0, c.op2, lhs0, ps; kwargs...)
     return Spectrum(c, Afunc, bfunc, cfunc, A, b, c_)
 end