diff --git a/py-tuutal/src/first_order.rs b/py-tuutal/src/first_order.rs
index cf0e297..69619df 100644
--- a/py-tuutal/src/first_order.rs
+++ b/py-tuutal/src/first_order.rs
@@ -22,11 +22,11 @@ macro_rules! first_order_method {
                 wrap_vec_func_scalar!(py, f, f_kwargs),
                 wrap_vec_func_vec!(py, g, g_kwargs),
                 &x0.as_array().to_owned(),
-                &DescentParameter::$name(gamma, beta),
+                DescentParameter::$name(gamma, beta),
                 gtol,
                 maxiter,
             ) {
-                Ok(value) => Ok(value.into_pyarray_bound(py)),
+                Ok((x, _fx)) => Ok(x.into_pyarray_bound(py)),
                 Err(error) => match error {
                     TuutalError::Convergence {
                         iterate: x,
diff --git a/py-tuutal/src/zero_order.rs b/py-tuutal/src/zero_order.rs
index 150874d..145afed 100644
--- a/py-tuutal/src/zero_order.rs
+++ b/py-tuutal/src/zero_order.rs
@@ -33,7 +33,7 @@ pub fn nelder_mead<'py>(
         adaptive.unwrap_or(false),
         bounds,
     ) {
-        Ok(value) => Ok(value.into_pyarray_bound(py)),
+        Ok((x, _fx)) => Ok(x.into_pyarray_bound(py)),
         Err(error) => match error {
             // Maybe better to throw also the current iterate and the number
             // actual function calls for this exception.
@@ -142,7 +142,7 @@ pub fn brent_unbounded(
     kwargs: Option<&Bound<'_, PyDict>>,
 ) -> PyResult<(f64, f64, usize)> {
     let func = wrap_scalar_func_scalar!(py, f, kwargs);
-    let brack = brack.map_or(None, |v| Some([v.0, v.1]));
+    let brack = brack.map(|v| [v.0, v.1]);
     match if let Some(val) = brack {
         brent_unbounded_rs(func, Some(&[val[0], val[1]]), maxiter, xtol)
     } else {