diff --git a/arch b/arch
index 0147de5a24..9a31f264ec 160000
--- a/arch
+++ b/arch
@@ -1 +1 @@
-Subproject commit 0147de5a248d7ba7be9d5dbd7addbe4aeae6088c
+Subproject commit 9a31f264ec72f07d40fb3b79f77ca72869ca8eee
diff --git a/drivers/bch/bch.h b/drivers/bch/bch.h
index 5463518349..157cf06133 100644
--- a/drivers/bch/bch.h
+++ b/drivers/bch/bch.h
@@ -62,10 +62,10 @@
 struct bchlib_s
 {
   FAR struct inode *inode; /* I-node of the block driver */
-  sem_t sem;               /* For atomic accesses to this structure */
+  uint32_t sectsize;       /* The size of one sector on the device */
   size_t nsectors;         /* Number of sectors supported by the device */
   size_t sector;           /* The current sector in the buffer */
-  uint16_t sectsize;       /* The size of one sector on the device */
+  sem_t sem;               /* For atomic accesses to this structure */
   uint8_t refs;            /* Number of references */
   bool dirty;              /* true: Data has been written to the buffer */
   bool readonly;           /* true: Only read operations are supported */