diff --git a/drivers/gpio/rdc321x-gpio.c b/drivers/gpio/rdc321x-gpio.c
index 22f31dc..2762698 100644
--- a/drivers/gpio/rdc321x-gpio.c
+++ b/drivers/gpio/rdc321x-gpio.c
@@ -73,7 +73,7 @@
 		gpch->data_reg[reg] &= ~(1 << (gpio & 0x1f));
 
 	pci_write_config_dword(gpch->sb_pdev,
-			reg ? gpch->reg1_data_base : gpch->reg2_data_base,
+			reg ? gpch->reg2_data_base : gpch->reg1_data_base,
 			gpch->data_reg[reg]);
 }