diff --git a/flashrom.c b/flashrom.c
index b1586fa..a75e452 100644
--- a/flashrom.c
+++ b/flashrom.c
@@ -105,7 +105,7 @@
 {
 	volatile uint8_t *bios;
 	struct flashchip *flash;
-	unsigned long base, size;
+	unsigned long base = 0, size;
 
 	for (flash = first_flash; flash && flash->name; flash++) {
 		if (chip_to_probe && strcmp(flash->name, chip_to_probe) != 0)