diff --git a/kprintf.asm b/kprintf.asm
index 12a416a..d1f1b0b 100644
--- a/kprintf.asm
+++ b/kprintf.asm
@@ -3,12 +3,12 @@
 ; write a character to kernel output
 ; in: al
 kputc:
-  push ax ; dont destroy ah
-  push dx
-  mov ah,0x02 ; DOS putc
-  mov dl,al
-  int 0x21
-  pop dx
+  push ax
+  push bx
+  mov bx, 0x0000
+  mov ah, 0x0e
+  int 0x10
+  pop bx
   pop ax
   ret