diff --git a/bootsect.asm b/bootsect.asm
index e8e376f..7209d23 100644
--- a/bootsect.asm
+++ b/bootsect.asm
@@ -68,12 +68,13 @@ _start:
 	mov [drivenumber], dl
 
 select_os:
-	mov ah, 0xe
 	mov si, prompt
 	.print:
 		lodsb
 		test al, al
 		jz .end
+		; On the original IBM PC BIOS the int 0x10 will clobber this
+		mov ah, 0xe
 		int 0x10
 		jmp .print
 	.end: