diff --git a/drivers/mtd/ubi/build.c b/drivers/mtd/ubi/build.c
index f399edc82191..a7e3eb9befb6 100644
--- a/drivers/mtd/ubi/build.c
+++ b/drivers/mtd/ubi/build.c
@@ -1350,6 +1350,7 @@ static int bytes_str_to_int(const char *str)
 		fallthrough;
 	case 'K':
 		result *= 1024;
+		break;
 	case '\0':
 		break;
 	default: