diff --git a/sys/dev/sio/sio.c b/sys/dev/sio/sio.c
index 5053886fe01..0234b80ba2a 100644
--- a/sys/dev/sio/sio.c
+++ b/sys/dev/sio/sio.c
@@ -2926,7 +2926,7 @@ static cn_checkc_t siocncheckc;
 static cn_getc_t siocngetc;
 static cn_putc_t siocnputc;
 
-#ifdef __i386__
+#ifndef __alpha__
 CONS_DRIVER(sio, siocnprobe, siocninit, NULL, siocngetc, siocncheckc,
 	    siocnputc, NULL);
 #endif
diff --git a/sys/isa/sio.c b/sys/isa/sio.c
index 5053886fe01..0234b80ba2a 100644
--- a/sys/isa/sio.c
+++ b/sys/isa/sio.c
@@ -2926,7 +2926,7 @@ static cn_checkc_t siocncheckc;
 static cn_getc_t siocngetc;
 static cn_putc_t siocnputc;
 
-#ifdef __i386__
+#ifndef __alpha__
 CONS_DRIVER(sio, siocnprobe, siocninit, NULL, siocngetc, siocncheckc,
 	    siocnputc, NULL);
 #endif