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-rw-r--r--kernel/multiboot.h4
1 files changed, 4 insertions, 0 deletions
diff --git a/kernel/multiboot.h b/kernel/multiboot.h
index 874e473..c82d7e2 100644
--- a/kernel/multiboot.h
+++ b/kernel/multiboot.h
@@ -1,4 +1,6 @@
//# https://www.gnu.org/software/grub/manual/multiboot/multiboot.html#Boot-information-format
+#ifndef MULTIBOOT_H
+#define MULTIBOOT_H
#include <stdbool.h>
@@ -48,3 +50,5 @@ typedef struct multiboot_mod_struct
uint32_t reserved;
}multiboot_mod;
+
+#endif