diff --git a/mx29f002.c b/mx29f002.c
index b85440f..20d8418 100644
--- a/mx29f002.c
+++ b/mx29f002.c
@@ -24,7 +24,7 @@
 
 int probe_29f002(struct flashchip *flash)
 {
-	volatile uint8_t *bios = flash->virtual_memory;
+	chipaddr bios = flash->virtual_memory;
 	uint8_t id1, id2;
 
 	chip_writeb(0xAA, bios + 0x5555);
@@ -47,7 +47,7 @@
 
 int erase_29f002(struct flashchip *flash)
 {
-	volatile uint8_t *bios = flash->virtual_memory;
+	chipaddr bios = flash->virtual_memory;
 
 	chip_writeb(0xF0, bios + 0x555);
 	chip_writeb(0xAA, bios + 0x555);
@@ -80,8 +80,8 @@
 {
 	int i;
 	int total_size = flash->total_size * 1024;
-	volatile uint8_t *bios = flash->virtual_memory;
-	volatile uint8_t *dst = bios;
+	chipaddr bios = flash->virtual_memory;
+	chipaddr dst = bios;
 
 	chip_writeb(0xF0, bios);
 	myusec_delay(10);