diff --git a/include/scsi/scsi_host.h b/include/scsi/scsi_host.h
index fcfa3d7..76e9d27 100644
--- a/include/scsi/scsi_host.h
+++ b/include/scsi/scsi_host.h
@@ -37,7 +37,7 @@
  *	 used in one scatter-gather request.
  */
 #define SG_NONE 0
-#define SG_ALL	SCSI_MAX_SG_SEGMENTS
+#define SG_ALL	SG_CHUNK_SIZE
 
 #define MODE_UNKNOWN 0x00
 #define MODE_INITIATOR 0x01