diff --git a/include/asm-i386/realmode.h b/include/asm-i386/realmode.h
index fcb76c3..a84f128 100644
--- a/include/asm-i386/realmode.h
+++ b/include/asm-i386/realmode.h
@@ -27,5 +27,6 @@
 
 int bios_setup(void);
 int enter_realmode(u16 seg, u16 off, struct pt_regs *in, struct pt_regs *out);
+int enter_realmode_int(u8 lvl, struct pt_regs *in, struct pt_regs *out);
 
 #endif