diff --git a/src/mbr_test.s b/src/mbr_test.s
index 3423637..13ccc29 100644
--- a/src/mbr_test.s
+++ b/src/mbr_test.s
@@ -47,8 +47,8 @@
     mov $'\n', %al
     call serial_putc
 
-    mov $691337, %eax
-    mov $10, %ecx
+    mov $0xCAFEBABE, %eax
+    mov $16, %ecx
     call itoa
 
     mov %ax, %si