diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index 77286eb5826d3ba6fda360b973c4ebd11af3d9ce..977a74e16efb20783c3bd468d1910fb4163f673e 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -290,7 +290,7 @@ config SX
 
 config RIO
 	tristate "Specialix RIO system support"
-	depends on SERIAL_NONSTANDARD && BROKEN_ON_SMP
+	depends on SERIAL_NONSTANDARD && BROKEN_ON_SMP && !64BIT
 	help
 	  This is a driver for the Specialix RIO, a smart serial card which
 	  drives an outboard box that can support up to 128 ports.  Product
diff --git a/drivers/char/rio/rio_linux.c b/drivers/char/rio/rio_linux.c
index d7d484024e2bf224b6fd3243f85b59bdc299df3b..2611b15b6bd1529e2f5bc8bb7f62fc06456fe86f 100644
--- a/drivers/char/rio/rio_linux.c
+++ b/drivers/char/rio/rio_linux.c
@@ -56,10 +56,6 @@
 #include <linux/generic_serial.h>
 #include <asm/uaccess.h>
 
-#if BITS_PER_LONG != 32
-#  error FIXME: this driver only works on 32-bit platforms
-#endif
-
 #include "linux_compat.h"
 #include "typdef.h"
 #include "pkt.h"