diff --git a/Kernel/StdLib.cpp b/Kernel/StdLib.cpp
index 25670a0e47..e146d643ee 100644
--- a/Kernel/StdLib.cpp
+++ b/Kernel/StdLib.cpp
@@ -1,5 +1,4 @@
 #include <AK/Assertions.h>
-#include <AK/StdLibExtras.h>
 #include <AK/Types.h>
 #include <Kernel/kmalloc.h>
 
@@ -7,11 +6,6 @@ extern "C" {
 
 void* memcpy(void* dest_ptr, const void* src_ptr, size_t n)
 {
-#ifndef KERNEL
-    if (n >= 1024)
-        return mmx_memcpy(dest_ptr, src_ptr, n);
-#endif
-
     size_t dest = (size_t)dest_ptr;
     size_t src = (size_t)src_ptr;
     // FIXME: Support starting at an unaligned address.