diff --git a/crates/core_simd/src/vendor/x86.rs b/crates/core_simd/src/vendor/x86.rs
index d3c19ccc539a..0dd47015ed22 100644
--- a/crates/core_simd/src/vendor/x86.rs
+++ b/crates/core_simd/src/vendor/x86.rs
@@ -8,10 +8,10 @@ use core::arch::x86_64::*;
 
 from_transmute! { unsafe u8x16 => __m128i }
 from_transmute! { unsafe u8x32 => __m256i }
-//from_transmute! { unsafe u8x64 => __m512i }
+from_transmute! { unsafe u8x64 => __m512i }
 from_transmute! { unsafe i8x16 => __m128i }
 from_transmute! { unsafe i8x32 => __m256i }
-//from_transmute! { unsafe i8x64 => __m512i }
+from_transmute! { unsafe i8x64 => __m512i }
 
 from_transmute! { unsafe u16x8 => __m128i }
 from_transmute! { unsafe u16x16 => __m256i }