diff --git a/.cargo/config.toml b/.cargo/config.toml
index a06c3c1..f400941 100644
--- a/.cargo/config.toml
+++ b/.cargo/config.toml
@@ -4,8 +4,6 @@ rustflags = [
     "-C",
     "target-cpu=native",
     "-C",
-    "target-features=+evex512,+fma4,+fma,+avx512f,+avx512pf,+avx512vl,+avx512dq,+avx512cd,+avx512bw",
-    "-C",
     "llvm-args=-ffast-math",
     "-C",
     "opt-level=3",
diff --git a/bench b/bench
index 1c159c0..ab10961 100755
Binary files a/bench and b/bench differ
diff --git a/src/kernels/striad.rs b/src/kernels/striad.rs
index 1af52f9..2d64e7c 100644
--- a/src/kernels/striad.rs
+++ b/src/kernels/striad.rs
@@ -18,7 +18,7 @@ pub fn striad(a: &mut [f64], b: &[f64], c: &[f64], d: &[f64], n: usize) -> f64 {
         a_slice
             .iter_mut()
             .enumerate()
-            .for_each(|(i, val)| *val = c[i].mul_add(d[i], b[i]))
+            .for_each(|(i, val)| *val = c[i] * d[i] + b[i])
     });
     s.elapsed().as_secs_f64()
 }