diff --git a/util/x86emu/x86.c b/util/x86emu/x86.c
index 0690b71681..2ce5b4534d 100644
--- a/util/x86emu/x86.c
+++ b/util/x86emu/x86.c
@@ -32,7 +32,6 @@ struct realmode_idt {
 };
 
 void x86_exception(struct eregs *info);
-void run_bios(struct device *dev, unsigned long addr);
 
 extern unsigned char __idt_handler, __idt_handler_size;
 extern unsigned char __realmode_code, __realmode_code_size;