diff --git a/src/kernel/boot/multiboot_header.S b/src/kernel/boot/multiboot_header.S
index ab80287..bf136b9 100644
--- a/src/kernel/boot/multiboot_header.S
+++ b/src/kernel/boot/multiboot_header.S
@@ -1,4 +1,8 @@
-#include <multiboot.h>
+#define MBOOT2_MAGIC 0xE85250D6
+#define MBOOT2_ARCH 0
+#define MBOOT2_LENGTH (Multiboot2HeaderEnd - Multiboot2Header)
+#define MBOOT2_CHECKSUM -(MBOOT2_MAGIC + MBOOT2_ARCH + MBOOT2_LENGTH)
+
 .section .multiboot
 
 .align 0x8
diff --git a/src/kernel/include/multiboot.h b/src/kernel/include/multiboot.h
deleted file mode 100644
index 9964bd1..0000000
--- a/src/kernel/include/multiboot.h
+++ /dev/null
@@ -1,7 +0,0 @@
-#pragma once
-
-#define MBOOT2_MAGIC 0xE85250D6
-#define MBOOT2_REPLY 0x36D76289
-#define MBOOT2_ARCH 0
-#define MBOOT2_LENGTH (Multiboot2HeaderEnd - Multiboot2Header)
-#define MBOOT2_CHECKSUM -(MBOOT2_MAGIC + MBOOT2_ARCH + MBOOT2_LENGTH)