diff --git a/libc/src/string/memory_utils/elements_x86.h b/libc/src/string/memory_utils/elements_x86.h
index e8be55b510e2..3b45275bad9e 100644
--- a/libc/src/string/memory_utils/elements_x86.h
+++ b/libc/src/string/memory_utils/elements_x86.h
@@ -30,7 +30,7 @@ namespace x86 {
 
 #ifdef __SSE2__
 template <typename Base> struct Vector : public Base {
-  static void Copy(char *dst, const char *src) {
+  static void Copy(char *__restrict dst, const char *__restrict src) {
     Base::Store(dst, Base::Load(src));
   }