diff --git a/kernel/vesa.c b/kernel/vesa.c
index 2f2d77c..adc436d 100644
--- a/kernel/vesa.c
+++ b/kernel/vesa.c
@@ -1,3 +1,4 @@
+#include <stddef.h>
 #include "vesa.h"
 #include "io.h"
 #include "print.h"