diff --git a/drivers/char/Kconfig b/drivers/char/Kconfig
index b1c07ed..0876199 100644
--- a/drivers/char/Kconfig
+++ b/drivers/char/Kconfig
@@ -312,7 +312,7 @@
 
 config SX
 	tristate "Specialix SX (and SI) card support"
-	depends on SERIAL_NONSTANDARD
+	depends on SERIAL_NONSTANDARD && (PCI || EISA || ISA)
 	help
 	  This is a driver for the SX and SI multiport serial cards.
 	  Please read the file <file:Documentation/sx.txt> for details.
diff --git a/drivers/char/sx.c b/drivers/char/sx.c
index a3008ce..1da92a6 100644
--- a/drivers/char/sx.c
+++ b/drivers/char/sx.c
@@ -2498,8 +2498,10 @@
 		/* It is safe/allowed to del_timer a non-active timer */
 		del_timer(&board->timer);
 		if (pdev) {
+#ifdef CONFIG_PCI
 			pci_iounmap(pdev, board->base);
 			pci_release_region(pdev, IS_CF_BOARD(board) ? 3 : 2);
+#endif
 		} else {
 			iounmap(board->base);
 			release_region(board->hw_base, board->hw_len);
@@ -2601,6 +2603,7 @@
 
 #endif
 
+#ifdef CONFIG_PCI
  /******************************************************** 
  * Setting bit 17 in the CNTRL register of the PLX 9050  * 
  * chip forces a retry on writes while a read is pending.*
@@ -2632,10 +2635,12 @@
 	}
 	iounmap(rebase);
 }
+#endif
 
 static int __devinit sx_pci_probe(struct pci_dev *pdev,
 				  const struct pci_device_id *ent)
 {
+#ifdef CONFIG_PCI
 	struct sx_board *board;
 	unsigned int i, reg;
 	int retval = -EIO;
@@ -2700,6 +2705,9 @@
 	board->flags &= ~SX_BOARD_PRESENT;
 err:
 	return retval;
+#else
+	return -ENODEV;
+#endif
 }
 
 static void __devexit sx_pci_remove(struct pci_dev *pdev)