diff --git a/field/src/fft.rs b/field/src/fft.rs
index 0a0b5dd8..5fe29b31 100644
--- a/field/src/fft.rs
+++ b/field/src/fft.rs
@@ -38,11 +38,7 @@ fn fft_dispatch<F: Field>(
     zero_factor: Option<usize>,
     root_table: Option<&FftRootTable<F>>,
 ) {
-    let computed_root_table = if root_table.is_some() {
-        None
-    } else {
-        Some(fft_root_table(input.len()))
-    };
+    let computed_root_table = root_table.is_none().then(|| fft_root_table(input.len()));
     let used_root_table = root_table.or(computed_root_table.as_ref()).unwrap();
 
     fft_classic(input, zero_factor.unwrap_or(0), used_root_table);
diff --git a/starky/src/prover.rs b/starky/src/prover.rs
index c7b77b93..29b72521 100644
--- a/starky/src/prover.rs
+++ b/starky/src/prover.rs
@@ -126,8 +126,6 @@ where
     );
 
     // Permutation arguments.
-
-    let constraint_degree = stark.constraint_degree();
     let lookup_challenges = stark.uses_lookups().then(|| {
         if let Some(c) = ctl_challenges {
             c.challenges.iter().map(|ch| ch.beta).collect::<Vec<_>>()