diff --git a/sys/amd64/include/md_var.h b/sys/amd64/include/md_var.h
index c5f0e458dfc6..862630f7096c 100644
--- a/sys/amd64/include/md_var.h
+++ b/sys/amd64/include/md_var.h
@@ -57,7 +57,6 @@ struct	reg;
 struct	fpreg;
 struct  dbreg;
 
-void	bcopyb(const void *from, void *to, size_t len);
 void	busdma_swi(void);
 void	cpu_halt(void);
 void	cpu_reset(void);