diff --git a/src/kernel/utility.asm b/src/kernel/utility.asm
index f8e6342..c8e0b98 100644
--- a/src/kernel/utility.asm
+++ b/src/kernel/utility.asm
@@ -20,15 +20,15 @@ default rel
 
 section .text
 
-;global memcpy
-;memcpy:
-;  mov rcx, rdx
-;  rep movsb
-;  ret
+global memcpy
+memcpy:
+  mov rcx, rdx
+  rep movsb
+  ret
 
-;global memzero
-;memzero:
-;  xor al, al
-;  mov rcx, rsi
-;  rep stosb
-;  ret
+global memzero
+memzero:
+  xor al, al
+  mov rcx, rsi
+  rep stosb
+  ret
diff --git a/src/kernel/utility.c b/src/kernel/utility.c
index 605619f..944ede5 100644
--- a/src/kernel/utility.c
+++ b/src/kernel/utility.c
@@ -28,16 +28,6 @@ int strequ(const char *str1, const char *str2) {
   }
 }
 
-void memcpy(void *to, const void *from, uint64_t bytes) {
-  for (uint64_t i = 0; i < bytes; ++i)
-    *(uint8_t *)(to + i) = *(const uint8_t *)(from + i);
-}
-
-void memzero(void *start, uint64_t bytes) {
-  for (uint64_t i = 0; i < bytes; ++i)
-    *(uint8_t *)(start + i) = 0;
-}
-
 uint32_t end_swap_u32(uint32_t value) {
   return
     (value >> 24) |