diff --git a/drivers/scsi/sim710.c b/drivers/scsi/sim710.c
index 3274ab7..255886a 100644
--- a/drivers/scsi/sim710.c
+++ b/drivers/scsi/sim710.c
@@ -75,7 +75,7 @@
 		else if(!strncmp(pos, "id:", 3)) {
 			if(slot == -1) {
 				printk(KERN_WARNING "sim710: Must specify slot for id parameter\n");
-			} else if(slot > MAX_SLOTS) {
+			} else if(slot >= MAX_SLOTS) {
 				printk(KERN_WARNING "sim710: Illegal slot %d for id %d\n", slot, val);
 			} else {
 				id_array[slot] = val;