1 files changed, 1 insertions, 0 deletions
diff --git a/memdisk/conio.h b/memdisk/conio.h
index 93ad000e..6a5b7d9a 100644
--- a/memdisk/conio.h
+++ b/memdisk/conio.h
@@ -21,6 +21,7 @@
 #define CONIO_H
 
 #include <stdint.h>
+#include <stddef.h>
 #include <stdarg.h>
 
 int putchar(int);