diff --git a/arch/arm/plat-s3c/dev-nand.c b/arch/arm/plat-s3c/dev-nand.c
index 84808ccda70ebf8e528d6aa5e44ba36048b17a2c..a52fb6cf618fb93e77e1aae7a37a14a55efede77 100644
--- a/arch/arm/plat-s3c/dev-nand.c
+++ b/arch/arm/plat-s3c/dev-nand.c
@@ -58,8 +58,8 @@ static int __init s3c_nand_copy_set(struct s3c2410_nand_set *set)
 			return -ENOMEM;
 	}
 	
-	size = sizeof(int) * set->nr_chips;
-	if (size) {
+	if (set->nr_map && set->nr_chips) {
+		size = sizeof(int) * set->nr_chips;
 		ptr = kmemdup(set->nr_map, size, GFP_KERNEL);
 		set->nr_map = ptr;