diff --git a/sys/conf/options.amd64 b/sys/conf/options.amd64
--- a/sys/conf/options.amd64
+++ b/sys/conf/options.amd64
@@ -24,13 +24,6 @@
 
 TIMER_FREQ			opt_clock.h
 
-# options for serial support
-COM_ESP			opt_sio.h
-COM_MULTIPORT		opt_sio.h
-CONSPEED		opt_sio.h
-GDBSPEED		opt_sio.h
-COM_NO_ACPI		opt_sio.h
-
 VGA_ALT_SEQACCESS	opt_vga.h
 VGA_DEBUG		opt_vga.h
 VGA_NO_FONT_LOADING	opt_vga.h
diff --git a/sys/conf/options.i386 b/sys/conf/options.i386
--- a/sys/conf/options.i386
+++ b/sys/conf/options.i386
@@ -67,13 +67,6 @@
 I586_CPU		opt_global.h
 I686_CPU		opt_global.h
 
-# options for serial support
-COM_ESP			opt_sio.h
-COM_MULTIPORT		opt_sio.h
-CONSPEED		opt_sio.h
-GDBSPEED		opt_sio.h
-COM_NO_ACPI		opt_sio.h
-
 VGA_ALT_SEQACCESS	opt_vga.h
 VGA_DEBUG		opt_vga.h
 VGA_NO_FONT_LOADING	opt_vga.h