diff --git a/fields/src/arch/x86_64/avx512_field_gl.rs b/fields/src/arch/x86_64/avx512_field_gl.rs
index 16c811cc..58bcc937 100644
--- a/fields/src/arch/x86_64/avx512_field_gl.rs
+++ b/fields/src/arch/x86_64/avx512_field_gl.rs
@@ -3,7 +3,7 @@
 //!
 //! How to build/run/test:
 //! RUSTFLAGS='-C target-feature=+avx512f,+avx512bw,+avx512cd,+avx512dq,+avx512vl' cargo build --features "avx512" --release
-#![feature(stdarch_x86_avx512)]
+#![cfg_attr(feature = "avx512", feature(stdarch_x86_avx512))]
 use crate::ff::*;
 use crate::field_gl::{Fr, FrRepr as GoldilocksField};
 use crate::packed::PackedField;
diff --git a/recursion/Cargo.toml b/recursion/Cargo.toml
index bde70276..48b924c1 100644
--- a/recursion/Cargo.toml
+++ b/recursion/Cargo.toml
@@ -54,4 +54,5 @@ wasm-bindgen-test = "0.3"
 [features]
 default = ["franklin-crypto/multicore", "wasmer/default", "starky/default", "plonky/default"]
 wasm = ["wasmer/js-default"]
-avx512 = ["fields/avx512"]
+#avx512 = ["fields/avx512", "starky/avx512", "plonky/avx512", "powdr/starky-avx512"]
+avx512 = ["fields/avx512", "starky/avx512", "plonky/avx512"]
diff --git a/starky/src/f3g.rs b/starky/src/f3g.rs
index 92b1bd9e..9da4da10 100644
--- a/starky/src/f3g.rs
+++ b/starky/src/f3g.rs
@@ -4,7 +4,7 @@ use core::ops::{Add, AddAssign, Div, DivAssign, Mul, MulAssign, Neg, Sub, SubAss
 use fields::field_gl::Fr;
 use fields::Field;
 use std::hash::{Hash, Hasher};
-use std::{slice, usize};
+use std::slice;
 
 use core::fmt::{Display, Formatter};
 /// GF(2^3) implementation
diff --git a/zkit/Cargo.toml b/zkit/Cargo.toml
index 3dcab95e..88c971df 100644
--- a/zkit/Cargo.toml
+++ b/zkit/Cargo.toml
@@ -28,4 +28,4 @@ anyhow = { version = "1.0", default-features = false }
 [features]
 default = []
 profiler = ["plonky/profiler", "starky/profiler", "groth16/profiler"]
-avx512 = ["starky/avx512"]
+avx512 = ["starky/avx512", "recursion/avx512"]