diff --git a/drivers/mtd/maps/pcmciamtd.c b/drivers/mtd/maps/pcmciamtd.c
index f988c81..8bbc751 100644
--- a/drivers/mtd/maps/pcmciamtd.c
+++ b/drivers/mtd/maps/pcmciamtd.c
@@ -616,7 +616,7 @@
 	} else if(mem_type == 2) {
 		mtd = do_map_probe("map_rom", &dev->pcmcia_map);
 	} else {
-		for(i = 0; i < sizeof(probes) / sizeof(char *); i++) {
+		for(i = 0; i < ARRAY_SIZE(probes); i++) {
 			DEBUG(1, "Trying %s", probes[i]);
 			mtd = do_map_probe(probes[i], &dev->pcmcia_map);
 			if(mtd)