diff --git a/sst49lf040.c b/sst49lf040.c
index 10452bf..a610092 100644
--- a/sst49lf040.c
+++ b/sst49lf040.c
@@ -26,7 +26,7 @@
 	int i;
 	int total_size = flash->total_size * 1024;
 	int page_size = flash->page_size;
-	volatile uint8_t *bios = flash->virtual_memory;
+	chipaddr bios = flash->virtual_memory;
 
 	for (i = 0; i < total_size / page_size; i++) {
 		/* Chip erase only works in parallel programming mode
@@ -42,7 +42,7 @@
 	int i;
 	int total_size = flash->total_size * 1024;
 	int page_size = flash->page_size;
-	volatile uint8_t *bios = flash->virtual_memory;
+	chipaddr bios = flash->virtual_memory;
 
 	printf("Programming page: ");
 	for (i = 0; i < total_size / page_size; i++) {