diff --git a/src/simd/avx2.rs b/src/simd/avx2.rs
index 4ef10c8..336cb30 100644
--- a/src/simd/avx2.rs
+++ b/src/simd/avx2.rs
@@ -1,7 +1,7 @@
 use crate::iter::Bytes;
 
 #[cfg(target_arch = "x86")]
-pub unsafe fn match_uri_vectored(_: &[u8]) -> usize {
+pub unsafe fn match_uri_vectored(_: &mut Bytes) {
     unreachable!("AVX2 detection should be disabled for x86");
 }
 
@@ -64,7 +64,7 @@ unsafe fn match_url_char_32_avx(buf: &[u8]) -> usize {
 }
 
 #[cfg(target_arch = "x86")]
-pub unsafe fn match_header_value_vectored(_: &[u8]) -> usize {
+pub unsafe fn match_header_value_vectored(_: &mut Bytes) {
     unreachable!("AVX2 detection should be disabled for x86");
 }