1 files changed, 5 insertions, 1 deletions
diff --git a/libc/stdio.c b/libc/stdio.c
index 17c5a2f..92fba27 100644
--- a/libc/stdio.c
+++ b/libc/stdio.c
@@ -1,6 +1,7 @@
-#include "stdio.h"
 #include "tty.h"
 #include <stdarg.h>
+#include <stdio.h>
+#include <stdlib.h>
 
 int putchar(int ch)
 {
@@ -51,6 +52,9 @@ int printf(const char *fmt, ...)
             case 'x':
                 print_hex(va_arg(ap, unsigned));
                 break;
+            case 'd':
+                puts(itoa(va_arg(ap, unsigned), 10));
+                break;
             default:
                 puts("printf: unknown format\n");
                 break;